Mobile computed tomography (CT) scanner and operation method thereof

Abstract

The invention discloses a mobile computed tomography (CT) scanner. The mobile CT scanner comprises a bottom plate platform, a machine frame, a rotary plate, an X-ray emitting source, and a detector and data acquisition system. The bottom plate platform is provided with a linear guide rail; and one end of the machine frame is provided with a guide rail sliding block which is slidably connected with the linear guide rail, and the other end of the machine frame is connected with the rotary plate. The rotary plate can rotate relative to the machine frame. The X-ray emitting source and the detector and data acquisition system are arranged on the rotary plate and are respectively positioned at two ends of the same diameter of the rotary plate. The X-ray emitting source comprises a grid controlled carbon nano tube-based field emission cathode X-ray tube. The invention also provides an operation method for the mobile CT scanner. The mobile CT scanner is simple in structure, low in radiation dosage, and high in imaging quality, and has two purposes.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a mobile CT scanner and an operation method. Background technique [0002] In my country, there are more than 10 million patients who need head CT scans every year due to brain diseases and brain injuries caused by traffic accidents. Many patients, especially those in traffic accidents, need CT diagnosis in a short time, and need to perform CT scan in the emergency room or operating room, or even in the ambulance, which is impossible for traditional fixed CT scanners Competent. Therefore, there is an urgent need for small, mobile CT scanners for head imaging. [0003] However, existing mobile CT scanners 1 (see figure 1 ) weighs more than 350kg, it is inconvenient to move when transferring and using, and the weight needs to be reduced. And the existing mobile CT scanner 1 mainly improves the miniaturization of the scanner volume and weight, and its core key components still u...

AI Technical Summary

Problems solved by technology

Hot filament X-ray tubes have the following disadvantages: First, the mode in which the hot filament emits electrons leads to slow start-up and short service life of this type of X-ray source, because the filament needs to be preheated, and it is very difficult to operate at high temperature and high current. Easily damaged, traditional CT scanners generally need to replace the CT tube once a year

Second, when continuous pulse scanning is required, the hot-filament X-ray tube cannot turn off the electron source, only by adjusting the bias voltage and filament current intensity to suppress electrons from hitting the anode target, or setting a mechanical gate at the ray exit To achieve continuous pulses, this undoubtedly increases the complexity of the X-ray source

Also, the impulsive performance of both methods is not good

Third, the hot filament X-ray tube also results in a higher radiation dose to the scanned object

The advantage of this method is that the center of gravity is stable, but the biggest disadvantage is that the ground requirements of the work site are very high, and it cannot be scanned in general ground and field environments, and the accuracy is not high. Due to the accuracy of the movement, helical scanning cannot provide clear faults. image

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