منابع مشابه
Individualized gating windows based on four-dimensional CT information for respiration-gated radiotherapy.
The purpose of this work is to relate the gating window and displacement of a moving tumor target and develop a systematic method to individualize the gating window for respiration-gated radiation therapy (RT). As the relationship between patient anatomy and respiration phase is contained in 4D images, we aim to quantify this information and utilize the data to guide gated treatment planning. A...
متن کاملAcute chest pain in emergency room. Preliminary findings with 40-64-slice CT ECG-gated of the whole chest.
ECG-gated MDCT of the entire chest represents the latest technical advance in the diagnostic work-up of atypical chest pain. The authors report their preliminary experience with the use of 40 and 64-slice CT in the emergency room and recommend to study only patients with moderate likelihood of coronary artery disease. ECG-gated MDCT of the entire chest will be preferentially performed on 64-sli...
متن کاملDetermining parameters for respiration-gated radiotherapy.
Respiration-gated radiotherapy for tumor sites affected by respiratory motion will potentially improve radiotherapy outcomes by allowing reduced treatment margins leading to decreased complication rates and/or increased tumor control. Furthermore, for intensity-modulated radiotherapy (IMRT), respiratory gating will minimize the hot and cold spot artifacts in dose distributions that may occur as...
متن کاملDiagnostic Accuracy and Clinical Outcomes of ECG-Gated, Whole Chest CT in the Emergency Department
PURPOSE The purpose of this study was to assess the diagnostic accuracy and one year prognosis of whole chest, "multiple rule out" CT for coronary artery disease (CAD) in Emergency Department patients. METHODS AND FINDINGS One hundred and two Emergency Department patients at low to intermediate risk of acute coronary syndrome (ACS), pulmonary embolism and/or acute aortic syndrome underwent a ...
متن کاملAutomated Coronary Artery Calcification Scoring in Non-Gated Chest CT: Agreement and Reliability
OBJECTIVE To determine the agreement and reliability of fully automated coronary artery calcium (CAC) scoring in a lung cancer screening population. MATERIALS AND METHODS 1793 low-dose chest CT scans were analyzed (non-contrast-enhanced, non-gated). To establish the reference standard for CAC, first automated calcium scoring was performed using a preliminary version of a method employing coro...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1997
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00001355089