Simplification of the patient set up in radiotherapy with guideline using epipolar geometry

Computer Assisted Radiology and Surgery (CARS) 201

Development of GPU-based Multi-threaded Software Application to Calculate Digitally Reconstructed Radiographs for Radiotherapy

To provide faster calculation of digitally reconstructed radiographs (DRRs) in patient-positioning verification, we developed and evaluated a GPU (graphic processing unit)-based DRR software application and comparison with a CPU (central processing unit)-based application. The evaluation metrics were calculation speed and image quality with various slice thicknesses. The results showed that GPU-based DRR computation was an average of 50 times faster than the CPU-based methodology, whereas the image quality was very similar. This excellent performance may increase the accuracy of patient positioning and improve the patient treatment-throughput time

Simplification of the patient set up in radiotherapy with guideline using epipolar geometry

Computer Assisted Radiology and Surger

Simplification of the patient set up in radiotherapy with guideline using epipolar geometry

Computer Assisted Radiology and Surger

Quantitative Radiation Dose Assessment in Helical Four-Dimensional CT forThoracic and Abdominal Radiotherapy

Current radiotherapy including photon and particle beams gives prescribed dose preciously, however, intrafractionalorgan motion is still basic problem in thoracic and abdominal treatment. To solve this, the advantage of 4DCT toquantify organ motion is beyond the conventional 3DCT ability. As a result, local control probability could beimproved. The patient will get a significantly inferior treatment with greater complications without 4DCT for tumorlocalization, albeit that, it is important to clarify the radiation dose from 4DCT. Here we quantified the radiation doseusing the anthropomorphic phantom in helical 4DCT scan. TLDs are inserted into the phantom anatomical positions.For thoracic and abdomen scan, the effective doses were 33.1 mSv and 27.5 mSv, respectively. The phantom received afew mSv of the X-ray scattering over the scan region, head and upper lobe of the lung as an example. The exposuredose from 4DCT scan is a little bit higher than that from multi-phase contrastThe 6th Japan-Korea Joint Meeting on Medical Physics and The 11th Asia Oceania Congress of Medical Physic