Tomography and image-guided radiotherapy device

Abstract

The invention discloses a tomography and image-guided radiotherapy device. The device comprises a high-energy ray source, a first detector and a second detector, wherein the second detector comprisesPET detectors and a CT detector located between the PET detectors; at least one medical diagnosis KV ray source is placed on the first detector, on the inner side of the first detector or on the outerside of the first detector, and is used for generating KV rays; the second detector receives the KV rays to perform KVCT imaging; the first detector and the second detector are also used for receiving gamma rays emitted by an object to perform PET imaging; the high-energy ray source generates high-energy rays for radiotherapy of the object; and the KVCT imaging and / or the PET imaging are / is usedfor assisting in and / or guiding radiotherapy of the object. The device simultaneously adopts the CT detector and the PET detectors, thereby improving the detection sensitivity of the device, improvingthe spatial resolution of KVCT imaging, and reducing scattering artifacts.

Description

technical field [0001] The invention relates to the fields of medical imaging and radiotherapy guidance, in particular to a tomographic imaging and image-guided radiotherapy device. Background technique [0002] Radiation therapy (Radiation Therapy) is currently one of the main ways to treat malignant tumors. In radiation therapy, image guidance (Image Guidance) is one of the key means to ensure high-precision treatment. Radiation therapy guidance is essentially the use of medical imaging to obtain accurate body position information of the patient before or during treatment, reducing the treatment errors caused by the patient's body placement, heartbeat, breathing and other organ movements, thereby improving or ensuring radiation therapy. the accuracy. Currently, the most common radiation therapy is the use of high-energy X-rays at the megavolt (MV) level, and the most common radiation therapy guidance is computed tomography (CT) based on kilovolt (KV) X-rays. In recent y...

AI Technical Summary

Problems solved by technology

[0008] At present, the CT imaging and image-guided radiotherapy devices based on PET detectors have two main limiting factors for the CT imaging quality: 1) The single pixel unit of PET detector is generally larger than the single pixel unit of CT detector; 2) PET detector Detectors are generally not descatter collimated

These limiting factors will result in low spatial resolution of CT imaging, large scattering artifacts, and low detection sensitivity

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