Development of a rotational set-up correction device for stereotactic head radiation therapy: A performance evaluation.

Development of a rotational set-up correction device for stereotactic head radiation therapy: A performance evaluation. J Appl Clin Med Phys. 2019 May 21;: Authors: Usui K, Isobe A, Hara N, Muroi T, Sajiki O, Ogawa K, Shikama N, Sasai K Abstract We developed a new head supporting device to provide accurate correction of rotational setup during image-guided radiation therapy (IGRT), evaluating its correction performance and the efficacy of dose distribution in stereotactic radiotherapy (SRT) using a helical tomotherapy (HT) system. The accuracy of rotational motion was measured using an electronic inclinometer; we compared device angles and measurement values from 0.0° to 3.0°. The correction accuracy was investigated based on the distance between rotational centers in the device and on megavoltage computed tomography (MVCT); the correction values were compared using distances in the range of 0.0-9.0 cm using a head phantom with a rotational error of 1.5°. For an SRT with a simultaneous integrated boost plan and a rotational error of 3.0° in yaw angle using a head phantom, and for a single-isocenter SRT for multiple brain metastases in the data of three patients, dosimetric efficacy of the HT unit was evaluated for calculated dose distributions with MVCT after rotational correction. This device can correct pitch and yaw angles within 0.3° and can be corrected to within 0.5° for each rotational angle according to the result of ...
Source: Journal of Applied Clinical Medical Physics - Category: Physics Authors: Tags: J Appl Clin Med Phys Source Type: research

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We present the case of a patient with vertebral dissemination from an intracranial GBM without intra-dural space invasion. The patient underwent a gross total tumor removal followed by radiation therapy (RT) with concomitant temozolomide chemotherapy (STUPP protocol).Following the appearance of back pain, patient underwent whole body computed tomography (CT) and spinal magnetic resonance imaging (MRI) scan.Spinal-MRI highlighted multiple vertebral lesions not infiltrating dura mater being confined to vertebral bodies. CT scan demonstrated the absence of other repetitive lesions in both thorax and abdomen. Histological exam...
Source: Interdisciplinary Neurosurgery - Category: Neurosurgery Source Type: research
SOMATOM Definition Flash, Model Number 10430603 - Product Usage: Computed tomography systems intended to generate and process cross-sectional images of patients by computer reconstruction of x-ray transmission data. The images delivered by the system can be used by a trained physician as an aid in diagnosis. The images delivered by the system can be used by trained staff as an aid in diagnosis, treatment preparation and radiation therapy planning. These CT systems can be used for low dose lunch cancer screening in high risk populations (as defined by professional medical societies).
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SOMATOM Drive, Model Number 10431700 - Product Usage: Computed tomography systems intended to generate and process cross-sectional images of patients by computer reconstruction of x-ray transmission data. The images delivered by the system can be used by a trained physician as an aid in diagnosis. The images delivered by the system can be used by trained staff as an aid in diagnosis, treatment preparation and radiation therapy planning. These CT systems can be used for low dose lunch cancer screening in high risk populations (as defined by professional medical societies).
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SOMATOM Confidence, Model Number 10590100 - Product Usage: Computed tomography systems intended to generate and process cross-sectional images of patients by computer reconstruction of x-ray transmission data. The images delivered by the system can be used by a trained physician as an aid in diagnosis. The images delivered by the system can be used by trained staff as an aid in diagnosis, treatment preparation and radiation therapy planning. These CT systems can be used for low dose lunch cancer screening in high risk populations (as defined by professional medical societies).
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SOMATOM Force, Model Number 10742326 - Product Usage: Computed tomography systems intended to generate and process cross-sectional images of patients by computer reconstruction of x-ray transmission data. The images delivered by the system can be used by a trained physician as an aid in diagnosis. The images delivered by the system can be used by trained staff as an aid in diagnosis, treatment preparation and radiation therapy planning. These CT systems can be used for low dose lunch cancer screening in high risk populations (as defined by professional medical societies).
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SOMATOM Edge Plus, Model Number 10267000 - Product Usage: Computed tomography systems intended to generate and process cross-sectional images of patients by computer reconstruction of x-ray transmission data. The images delivered by the system can be used by a trained physician as an aid in diagnosis. The images delivered by the system can be used by trained staff as an aid in diagnosis, treatment preparation and radiation therapy planning. These CT systems can be used for low dose lunch cancer screening in high risk populations (as defined by professional medical societies).
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SOMATOM Definition Edge, Model Number 10590000 - Product Usage: Computed tomography systems intended to generate and process cross-sectional images of patients by computer reconstruction of x-ray transmission data. The images delivered by the system can be used by a trained physician as an aid in diagnosis. The images delivered by the system can be used by trained staff as an aid in diagnosis, treatment preparation and radiation therapy planning. These CT systems can be used for low dose lunch cancer screening in high risk populations (as defined by professional medical societies).
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SOMATOM Definition AS, Model Number 8098027 - Product Usage: Computed tomography systems intended to generate and process cross-sectional images of patients by computer reconstruction of x-ray transmission data. The images delivered by the system can be used by a trained physician as an aid in diagnosis. The images delivered by the system can be used by trained staff as an aid in diagnosis, treatment preparation and radiation therapy planning. These CT systems can be used for low dose lunch cancer screening in high risk populations (as defined by professional medical societies).
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The aim of this study was to analyze dose-volume histogram (DVH) of the remnant liver for postoperative cholangiocarcinoma (CCA) patients, to find toxicity rates, and to confirm efficacy of postoperative radiation therapy (RT). Thirty-two postoperative CCA patients received partial liver resection and postoperative RT with curative intent. The “liver reduction rate” was calculated by contouring liver volume at computed tomography (CT) just before the surgery and at CT for planning the RT. To evaluate late toxicity, the radiation-induced hepatic toxicity (RIHT) was determined by the common terminology criteria ...
Source: Medicine - Category: Internal Medicine Tags: Research Article: Observational Study Source Type: research
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Source: The British Journal of Radiology - Category: Radiology Authors: Tags: Br J Radiol Source Type: research
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