31 results about "Ct diagnosis" patented technology

The invention discloses a pCR prediction method based on multi-type medical data. The method includes the following steps that: clinical data, CT diagnosis reports and enteroscope images are obtainedfrom a medical department; an SVM is trained by using the clinical data, a BERT model is obtained by means of transfer learning training with the CT diagnosis reports, and a Faster-RCNN model is obtained by means of transfer learning training on the basis of the enteroscope images; and the clinical data, CT diagnosis report and enteroscope image of a patient to be predicted are inputted into the three trained models, predicted pCR probabilities p1, p2 and p3 are obtained, the predicted pCR probabilities p1, p2 and p3 are fused, a final predicted pCR probability p is obtained, and if p is greater than a set threshold T, it is predicted that the patient has pCR. According to the method, the Faster-RCNN network is used; a tumor ROI can be automatically generated; a whole process does not needmanual intervention; and prediction efficiency is improved. The neural network is used for representation learning; manual setting and feature selection are not needed; and therefore, the accuracy and efficiency of prediction are improved. PCR prediction is carried out by combining the clinical data and the CT diagnosis report of the patient, so that prediction accuracy is improved.

The invention discloses a corona virus disease 2019 screening method and system based on deep learning. The corona virus disease 2019 screening method comprises the steps: detecting a lung lesion areaof CT by using a deep learning detection model, and conveying the lung lesion area of CT into a three-classification network, wherein three classifications comprise COVID-19, influenza A and non-infection symptoms; and through calculation processing, outputting a CT diagnosis result and a disease probability. According to the method, based on deep learning, characteristics of CT images are automatically learned to distinguish COVIDI-19, influenza A and healthy people, so that the method is high in accuracy, the overall accuracy of current testing reaches 86.7%, the diagnosis speed is high, and only 30-60 S is needed for one set of CT according to different slice numbers; and a user can upload a CT image file and calculate and output a CT diagnosis result and the disease probability through the corona virus disease 2019 screening system, so that operation is convenient, the speed is high, and the detection rate of COVID-19 is greatly increased.

An aqueous negative contrast agent for CT imaging of the gastrointestinal tract and the preparation method thereof. The agent is used in biological and pharmaceutical field. Its components and the weight percent are: hydrogel matrix 0.01-1%, micro- / nano-particles of the materials with low densities 5-50%, stabilization agents 0.1-5%, the rest is deionized water. The preparation method is: stabilization agents are added into the hydrogel matrix made of natural or synthetic hydrophilic polymers, then micro- / nano-particles of the materials with low CT densities are added or prepared, and uniformly dispersed in the hydrogel matrix. The CT density of the resulted aqueous negative contrast agent for CT imaging of the gastrointestinal tract is −30HU to −500HU. It can decrease the CT density inside the intestine lumen to lower than −30HU. The intestine wall can be depicted clearly and the CT signals intensities inside lumen are uniform. It is feasible for 3D images processing such as virtual endoscopy reconstruction with the negative contrast agent. The agent is safe, stable and nontoxic. It will not lead to diarrhea after administration. It is of great significance for the improved sensitivity and specificity of CT diagnosis for the diseases on the intestinal wall and lumen.

The invention relates to a closed upward horizontal CT diagnostic device, and belongs to the technical field of medical equipment. The closed upward horizontal CT diagnostic device disclosed by the invention comprises a main body, wherein a front supporting plate and a rear supporting plate are arranged on the lower side of the main body; an oxygen carrier storage tank is arranged on the front side of the front supporting plate; an oxygen carrier is arranged inside the oxygen carrier storage tank; an oxygen carrier storage tank front door is arranged on the left side of the oxygen carrier storage tank; an electromagnet is arranged on the oxygen carrier storage tank front door; a magnet is arranged on the right side of the oxygen carrier storage tank; an oxygen transferring frequency display is arranged on the right side of the oxygen carrier storage tank; an oxygen transferring frequency increase button is arranged on the lower side of the oxygen transferring frequency display; an oxygen transferring frequency decrease button is arranged below the oxygen transferring frequency increase button; a power supply box is arranged on the front side of the rear supporting plate. The device disclosed by the invention is complete in functions and convenient to use and is safe, efficient and low in time and labor consumption while performing CT diagnosis on a patient, and workload of medical personnel is greatly alleviated.

The invention discloses a stent for assisting computed tomography (CT) diagnosis of tarsometatarsal joint injury. The stent comprises a stent main body, a foot fixer, a pedal, an inner tube and an adjusting piece, wherein the inner tube is fixedly arranged on the stent main body; the adjusting piece is arranged on the inner tube in a rotatable and sliding mode; and both the foot fixer and the pedal are fixedly connected with the adjusting piece. The stent for assisting the CT diagnosis of the tarsometatarsal joint injury can assist a patient in maintaining a foot at a plantar flexion ectropion position in the CT diagnosis process, so that diagnosis is facilitated, the requirement of the CT diagnosis for the flexion direction of the foot of the patient is met, the CT diagnosis operation can be accurately performed, and the accuracy and the precision of the diagnosis result are ensured.

The invention provides a liver CT diagnosis system based on computer assistance. The liver CT diagnosis system comprises an image acquisition module, an image three-dimensional reconstruction module,an image enhancement module and an image segmentation module, wherein the image acquisition module comprises a CT machine and a computer, the CT machine imports acquired liver CT slice images into thecomputer, and the computer processes the liver CT slice images to obtain two-dimensional liver images; and the liver three-dimensional image reconstruction module is used for drawing and reconstructing the two-dimensional liver image to obtain a three-dimensional liver image. The image enhancement module is used for carrying out blood vessel enhancement processing on the three-dimensional liver image to obtain a blood vessel enhanced image; the image segmentation module is used for segmenting the blood vessel enhanced image; according to the CT diagnosis method for the liver based on computerassistance, scientific research personnel can conveniently research and know the position of the blood vessel in the liver area, and liver operation can be well assisted.

The invention provides a heteropolyacid nano-molecular medicine as well as a preparation method and an application thereof. The medicine comprises heteropolyacid or heteropolyacid salt molecules and a coating material coating the surface of heteropolyacid or the heteropolyacid salt molecules, wherein the heteropolyacid or heteropolyacid salt molecules have the structure shown in (I), (II) or (III). The heteropolyacid nano-molecular medicine can selectively interact with tumor cells and can be used as a contrast agent in magnetic resonance imaging and CT diagnosis of tumors; besides, the medicine molecules have strong oxidation-reduction quality and light sensitivity and thus can be used as medicines assisting in thermal therapy, meanwhile, the molecules have strong X-ray absorption capacity and thus can perform functions as auxiliary radiotherapy medicines, so that diagnosis and treatment of tumors can be realized simultaneously, integration of diagnosis and treatment can be realized, targeted treatment of tumors is enhanced, and the tumor treatment effect is improved.

The invention discloses a patient breath-holding monitoring device and method applied to CT scanning. The device includes a breathing mouthpiece, an air guide tube and a breath-holding monitoring host; the breathing mouthpiece is connected to the breath-holding monitoring host through the air guide tube to form an integrated structure, the breathing mouthpiece includes a biting part and a joint part, and a bottom opening of the biting part communicates with the joint part; the breath-holding monitoring host includes a shell, a breathing sensor and a host circuit board, the breathing sensor isconnected to the interior of a conductor groove of the host circuit board through an electric conduction patch plug, the shell is provided with a main airway and an air inlet and outlet of the breathing sensor, and the main airway of the breathing sensor communicates with the air inlet and outlet; and each end of the air guide tube is provided with a connection opening, one connection opening in one end of the air guide tube communicates with the joint part of the breathing mouthpiece, and one connection opening in the other end communicates with the main airway of the breathing sensor. When the device and method provided by the invention are implemented, the breathing mouthpiece is placed on a patient mouth to directly monitor patient breath-holding conditions during the CT scanning, so that the quality of CT scanning images is improved, and the accuracy of CT diagnosis results is improved.

An aqueous negative contrast agent for CT imaging of the gastrointestinal tract and the preparation method thereof. The agent is used in biological and pharmaceutical field. Its components and the weight percent are: hydrogel matrix 0.01-1%, micro- / nano-particles of the materials with low densities 5-50%, stabilization agents 0.1-5%, the rest is deionized water. The preparation method is: stabilization agents are added into the hydrogel matrix made of natural or synthetic hydrophilic polymers, then micro- / nano-particles of the materials with low CT densities are added or prepared, and uniformly dispersed in the hydrogel matrix. The CT density of the resulted aqueous negative contrast agent for CT imaging of the gastrointestinal tract is −30 HU to −500 HU. It can decrease the CT density inside the intestine lumen to lower than −30 HU. The intestine wall can be depicted clearly and the CT signals intensities inside lumen are uniform. It is feasible for 3D images processing such as virtual endoscopy reconstruction with the negative contrast agent. The agent is safe, stable and nontoxic. It will not lead to diarrhea after administration. It is of great significance for the improved sensitivity and specificity of CT diagnosis for the diseases on the intestinal wall and lumen.

The invention discloses a heart CT structural report system which comprises a structural processing module, a computer auxiliary diagnosing module, a database module, a template analyzing module, a display module, a storing module and an inquiring module. By means of the heart CT structural report system, a CT diagnosis report is structurally processed, a temperature and data are separated out, the template is automatically filled up according to actual needs to form a complete diagnosis report after the computer auxiliary diagnosing system obtains related case data, the work efficiency of a doctor is improved, and the heart CT structural report system has the advantages of being accurate, efficient, capable of saving time and labor and suitable for application and popularization.

The present invention relates t oa soft X-ray filtering sheet for medical X-ray apparatus. It is made up by using aluminium, zinc, copper, manganese and iron as raw material components according to a certain weight ratio through the process of hydraulic-pressing or sintering treatment. Said invented product can filter off soft X-ray, only allow the hard X-ray to pass through, so that it not only can reduce radiation damage to human body, but also can obtain clear roentgenogram, and can reduce radioactive rays quantity by above 50%. Said invention is low in cost, can be used in the fields of fluoroscopy, CT diagnosis and cardiac catheterization, etc..

The invention relates to a closed upward horizontal CT diagnostic device, and belongs to the technical field of medical equipment. The closed upward horizontal CT diagnostic device disclosed by the invention comprises a main body, wherein a front supporting plate and a rear supporting plate are arranged on the lower side of the main body; an oxygen carrier storage tank is arranged on the front side of the front supporting plate; an oxygen carrier is arranged inside the oxygen carrier storage tank; an oxygen carrier storage tank front door is arranged on the left side of the oxygen carrier storage tank; an electromagnet is arranged on the oxygen carrier storage tank front door; a magnet is arranged on the right side of the oxygen carrier storage tank; an oxygen transferring frequency display is arranged on the right side of the oxygen carrier storage tank; an oxygen transferring frequency increase button is arranged on the lower side of the oxygen transferring frequency display; an oxygen transferring frequency decrease button is arranged below the oxygen transferring frequency increase button; a power supply box is arranged on the front side of the rear supporting plate. The device disclosed by the invention is complete in functions and convenient to use and is safe, efficient and low in time and labor consumption while performing CT diagnosis on a patient, and workload of medical personnel is greatly alleviated.

The invention relates to the technical field of medical detection reagents. CT liver-specific contrast agent refers to the use of phagocytosis of kupffer cells in the reticuloendothelial system of the liver to specifically accumulate the contrast agent in the liver, which improves the sensitivity and specificity of CT diagnosis. At present, the research on macromolecular or granular CT liver-specific contrast agents is mostly focused on encapsulating conventional CT contrast agents with liposomes, which generally have disadvantages such as low encapsulation efficiency, low drug loading, and unstable preparations. The invention provides a liver-specific CT contrast agent and a preparation method thereof. It adopts ethyl cellulose as a carrier, wraps derivatives of triiodoisophthalic acid, and obtains iodine-containing ethyl cellulose microspheres.

The invention relates to a patient support system for standing position CT diagnosis, and belongs to the technical field of medical supports, the patient support system comprises a base and an upper seat for a patient to stand, and the upper seat is installed on the base in a lifting mode through a scissor arm system; the fixed end of the electric telescopic rod is installed on the base, and the electric telescopic rod is connected with the scissor arm system to drive the scissor arm system to stretch out and draw back; the back plate assembly is detachably and fixedly installed on the upper seat and used for a patient standing on the upper seat to lean on. Through the structure, the patient support system enlarges the human body detection range through the lifting upper seat, and is reasonable in structure and high in practicability.

The invention relates to the technical field of medical instruments, in particular to a positioning device for head CT diagnosis. According to the technical scheme, a fixing plate is arranged, a rectangular piece and a neck supporting assembly are arranged at the top of the fixing plate, a first two-way lead screw is arranged in the middle of the lower portion of the fixing plate, moving plates are evenly arranged on a rod body of the first two-way lead screw, and three sets of moving grooves are evenly and horizontally formed in the fixing plate; auxiliary positioning mechanisms are arranged at the positions, corresponding to the fixed plate moving grooves, of the moving plate, and each auxiliary positioning mechanism comprises a head top positioning assembly, a head middle area positioning assembly and a neck side positioning assembly. Through cooperation of the abutting block, the U-shaped piece, the threaded rod, the rectangular rod, the moving block, the connecting rod, the rotating piece, the two-way lead screw, the air bag and the push rod, the head of a patient can be positioned and supported at different positions, the head top can be supported in multiple directions according to the condition of the patient, and the head CT diagnosis positioning efficiency and stability are improved.

The invention discloses a system and method for monitoring breath holding of a patient by means of infrared distance measurement. The system comprises an infrared distance measurement mainframe, a jitter transfer device and a computer terminal; the jitter transfer device comprises a light reflection board, an abdominal protective sleeve and a communicating mechanism; the infrared distance measurement mainframe comprises a mainframe shell, a mainframe circuit board, an infrared emitting end, an infrared receiving end and a serial interface; the infrared emitting end comprises an infrared emitting tube and a convex lens; the infrared receiving end comprises an infrared receiving tube light filter; the mainframe circuit board comprises an infrared emitting circuit, an infrared receiving circuit, an amplifying circuit, an A / D converter, a single chip microcomputer, an RS232 to RS485 conversion circuit and an interface circuit; and the computer terminal is connected with the infrared distance measurement mainframe through the serial interface, and breath holding monitoring app software used for detecting a breath holding state of the patient is installed on the computer terminal. According to the system and method for monitoring breath holding of the patient by means of infrared distance measurement, the breath holding situation of the patient during CT scanning can be monitored bymeans of infrared distance measurement, the quality of CT scanning images is improved, and the accuracy of a CT diagnosis result is improved.

The invention relates to the technical field of tarsometatarsal joint treatment, in particular to a support for assisting CT diagnosis of tarsometatarsal joint injuries, and overcomes the defects that no supporting equipment is used for pressing soles during tarsometatarsal joint CT scanning, so that the radiography effect is not ideal, and the supporting equipment cannot adapt to the sizes of feet of different patients. A first supporting plate is welded to the top of the first supporting column, a second supporting plate is fixed to the top of the second supporting column through welding, a connecting rod is clamped to the bottom of the first supporting plate, connecting plates are fixed to the ends of the two sides of the second supporting plate through welding, and first rotary knobs are connected to the outer sides of the connecting plates through threads. According to the auxiliary support for diagnosing the tarsometatarsal joint, the shank of a patient is effectively supported, the foot is effectively fixed, the foot is pressed downwards, CT scanning is facilitated, and a doctor can judge the injury condition easily.

The invention discloses an electronic scanner for hospital surgery remote diagnosis, and a use method thereof. The electronic scanner comprises a shell, a manned table rotationally is connected to the inner wall of a scanning cavity, the electronic scanner further comprises CT scanning heads arranged vertically and a driving mechanism used for driving the CT scanning heads to move transversely and driving the manned table to rotate, and the transverse movement of the CT scanning heads and the rotation of the manned table are alternately carried out. The electronic scanner has the effects that the parts above the chest of a patient can be subjected to remote omnibearing scanning firstly and then the parts below the chest of the patient can be subjected to close omnibearing scanning through a single driving component, so the problems that when the CT diagnostic imaging device is used, a CT scanning head of the CT diagnostic imaging device cannot automatically perform omnibearing scanning on the patient, the CT diagnostic imaging device cannot automatically perform omnibearing scanning on the patient, a patient needs to walk or move CT diagnosis imaging equipment by himself or herself, operation is troublesome, the CT scanning head of the patient is often close to the patient during scanning, and therefore radiation has large harm to the head of the patient when the head of the patient is scanned are solved.

The invention relates to the technical field of medical instruments, and discloses a support for assisting CT diagnosis of tarsometatarsal joint injury, the support comprises a bottom plate, two bearing plates are fixedly mounted at the top of the bottom plate, and a plurality of first sliding rods are movably inserted into the outer surfaces of the two bearing plates. According to the support for assisting CT diagnosis of the tarsometatarsaljoint injury, a multi-angle adaptation structure is additionally arranged, a clamping structure replaces a traditional bolt structure, a sole massage structure is additionally arranged, and the problems that most supports cannot be adjusted for patients with different foot types, or the treatment efficiency is affected due to the fact that the adjusting amplitude is not large are avoided; the problems that an existing support needs to be disassembled by screwing a large number of bolts, the efficiency is low, emergency diagnosis is not facilitated, the existing support cannot move the sole, and when a patient wears the support for a long time, blood circulation of the bottom of the sole is not smooth, the recovery speed is low, and meanwhile the muscle atrophy of the foot of the patient can be caused are solved.

The invention relates to a limb limiting structure facilitating CT diagnosis, and belongs to the technical field of medical equipment. According to the technical scheme, the limb limiting device mainly aims at solving the problem that defects exist when existing equipment is used for limiting limbs, the limb limiting device comprises a bed board, a rope net and a head pillow block, the front face and the back face of the rope net are both slidably connected with movable plates located on the shell wall of the bottom of the bed board, and limiting bases are arranged at the tops of the movable plates. Through the combination of the telescopic support, the adjusting mechanism, the movable plate, the motor and the limiting seat, synchronous fine adjustment can be conducted on the limiting structure according to the body type of a patient when limb limiting is conducted on the patient, and fixed design or single manual adjustment in the prior art is replaced; by arranging the combination of an electric push rod, a first telescopic rod, an adjusting rod, a second telescopic rod, a connecting plate and a buckle plate mechanism, synchronous adjustment of a plurality of limb limiting structures is achieved, the buckle plate mechanism in the device can conveniently replace a protection pad in the buckle plate mechanism, and therefore the local maintenance cost of the device is reduced.

The embodiment of the present invention discloses a method for locating the body surface. The method includes: before the CT diagnostic scan, use the first image collector to collect the frontal image of the scanned human body, and determine the measured body surface of the scanned human body according to the frontal image. point, and obtain the projection angle of the line connecting the body surface measured point and the first image collector on the scanning bed; use the second image collector to collect the side image of the scanned human body, and use the side image to obtain the measured body surface The vertical distance between the point and the scanning bed, and obtain the current bed height of the scanning bed, the initial bed height of the scanning bed, and the horizontal bed code corresponding to the initial position of the measured point on the body surface; Scan the horizontal bed code on the bed to realize the positioning of the measured points on the body surface. The embodiment of the present invention also provides a body surface positioning device. The invention improves the health level of patients and saves X-ray dose.

The invention discloses a patient transfer cart for CT diagnosis, and relates to the field of medical carts. The patient transfer cart for CT diagnosis comprises a transfer cart base and a stretcher plate. When the patient transfer cart for CT diagnosis is used, the stretcher plate and the supporting alignment top plate are designed in a split mode, and when a patient is transferred, the stretcher plate and the supporting alignment top plate can be separated firstly; mechanisms such as limiting supporting pipes and rectangular notches corresponding to the bottoms of the supporting alignment top plates are also designed on a lower flat plate of the CT diagnosis equipment, so that positioning of the stretcher plate is guaranteed, CT diagnosis and treatment are facilitated, the whole use function of the device is good, pains suffered by a patient who is inconvenient to move can be reduced, and the working efficiency of the CT diagnosis equipment is improved. When the stretcher plate is connected with the supporting alignment top plate, the overall supporting height of the stretcher plate can be adjusted through the lifting mechanism.

The invention relates to the technical field of CT equipment manufacturing, in particular to an emergency semitrailer CT. The emergency semitrailer CT comprises a semitrailer chassis steel beam; a compartment, electric hydraulic supporting legs, wheels and a semitrailer traction assembly are fixed to the semitrailer chassis steel beam; the compartment at least comprises a scanning room and an operation room; a CT scanning frame and a CT diagnosis bed are arranged in the scanning room; a CT installation and maintenance door and a patient access door are formed in the side wall of the scanning room; a CT power distribution cabinet, a main power distribution cabinet, a CT control cabinet and an operation table are arranged in the operation room; an air conditioner outdoor unit and an energy storage power source are arranged outside the compartment; and a doctor access door and an external observation window are formed in the side wall of the operation room; a contact door, a scanning observation window and steps are arranged between the operation room and the scanning room. According to the semitrailer CT equipment, CT equipment and a semitrailer are integrated; when the semitrailer CT needs to be moved and transported, only one tractor is needed, and flexibility and convenience are achieved; and the service life of the semitrailer is as long as 25 years which basically cover thecomplete service life of the CT.

The invention relates to the technical field of CT diagnosis, in particular to a body surface positioning device for CT diagnosis. The body surface positioning device comprises a first positioning piece, a second positioning piece and a clamping block, wherein the first positioning piece and the second positioning piece are the same in structure, evenly-distributed connecting ropes are arranged between and connected with the lower end of the first positioning piece and the upper end of the second positioning piece, a gluing layer is arranged at the lower end of the second positioning piece, fixing strips are fixedly arranged on the two sides of the first positioning piece, and the ends, away from the first positioning piece, of the fixing strips are fixedly connected with one end of a gooseneck pipe. When the body surface positioning device is used, the second positioning piece is fixed on the body of a patient through the gluing layer, and then the first positioning piece is fixed to a bed board through the clamping block; and in an axial CT scanning process, the second positioning piece fluctuates up and down along with the body of the patient, the position of the first positioning piece is kept unchanged, the second positioning piece and the first positioning piece are combined, so positioning precision can be effectively improved, and follow-up operation can be smoothly carried out conveniently.

The invention relates to a medical instrument and the technical field of medical instruments, in particular to a radiation CT diagnosis imaging instrument convenient to adjust. According to the technical scheme, the system comprises a diagnosis instrument and a diagnosis moving bed, and a pillow mechanism is arranged on the upper side of the diagnosis moving bed; the pillow mechanism comprises a shell, a plurality of lifting rods which are evenly distributed and can ascend and descend are arranged on the upper side of the shell, and a locking piece capable of fixing the lifting rods is arranged in the shell. The locking piece comprises a moving plate capable of moving transversely, and a plurality of long through holes matched with the lifting rods are formed in the moving plate. The heights of the multiple lifting rods are adjusted in a self-adaptive mode, so that the headrest composed of the multiple comfortable soft blocks is matched with the head shape of a patient, and the positions of the multiple lifting rods are limited through the driving mechanism; through operation of the driving mechanism, the head of the patient can be softly fixed through the head fixing mechanisms on the two sides, the head of the patient can be limited from moving randomly, and diagnosis is prevented from being affected.

The invention relates to the technical field of medical equipment, in particular to an efficient heat dissipation device of CT diagnosis equipment. In order to solve the problems that an existing heat dissipation device is limited in heat dissipation range and not high in efficiency on the CT diagnosis equipment, the technical scheme includes that the CT diagnosis equipment heat dissipation device comprises a CT diagnosis equipment outer shell, a heat dissipation air bellow is slidably connected to the inner side of the CT diagnosis equipment outer shell, a cleaning mechanism used for cleaning dust is installed on the outer side of the heat dissipation air bellow, and an angle adjusting mechanism is installed on the inner side of the heat dissipation air bellow; a heat dissipation air bellow is installed on the outer shell, a dustproof ventilation net is installed at an opening of the heat dissipation air bellow, a heat dissipation fan is installed on the angle adjusting mechanism and located on one side of the ventilation net, and the cleaning mechanism comprises a wave guide rail fixed to the inner side of the outer shell of the CT diagnostic equipment and a brush connecting arm rotationally connected with the heat dissipation air bellow. And the two brush connecting arms are connected with a cleaning soft brush. The angle of the cooling fan can be automatically adjusted, and the swing amplitude can be adjusted at will, so that the high temperature of the CT diagnosis equipment can be quickly dissipated.

The invention relates to the technical field of CT diagnosis assistance, in particular to an automatic CT image self-diagnosis assisting device, which comprises a base, wherein a mounting disc capable of rotating left and right is arranged at the front end of the upper surface of the base, a CT image machine is mounted on the mounting disc, a movable column is arranged on the rear side of the mounting disc, a connecting arm is hinged to the end of the movable column, the upper surface of the base is provided with a rotating disc capable of moving back and forth, the disc surface of the rotating disc is provided with an annular guide groove, a plurality of protrusions are arranged in the guide groove, the end of the connecting arm is placed in the guide groove, and the connecting arm abuts against the protrusions. According to the invention, the problems that auxiliary equipment adopted during CT diagnosis cannot rapidly adjust positioning of the CT machine and diagnosis is affected are solved; and the diagnosis auxiliary device can effectively and adaptively adjust the position of the CT machine, the adjusting process is rapid and efficient, the CT diagnosis efficiency can be greatly improved, the diagnosis accuracy is ensured, and the use effect is obvious.

The invention discloses application of a double-chamber double-input blood perfusion model in early diagnosis of liver cancer of FDG-18 pet. The application comprises the following steps: calculatingperfusion parameters by adopting a fitting method, wherein the perfusion parameters comprise hepatic artery blood flow, portal vein blood flow, total blood flow, hepatic artery perfusion index, portalvein perfusion index, distribution volume, extracellular average transit time and intracellular uptake rate; generating hepatic artery blood flow, hepatic artery perfusion index, extracellular average transit time and intracellular uptake rate images by using software; comparing perfusion parameters of hepatocellular carcinoma tissues and surrounding liver tissues with a maximum standard uptake value based on metabolic PET / CT (suvmax); and evaluating the values of PET / CT perfusion imaging and metabolic PET / CT diagnosis of liver cancer by two reviewers. When a double-input double-chamber uptake model is adopted for analysis, the PET / CT perfusion parameters and images have good performance in the aspect of diagnosing hepatocellular carcinoma.