| Autor: |
Khadijeh, Bamneshin, Seied, Rabi Mahdavi, Ahmad, Bitarafan-Rajabi, Parham, Geramifar, Payman, Hejazi, Majid, Jadidi |
| Rok vydání: |
2019 |
| Zdroj: |
Journal of biomedical physicsengineering. 12(5) |
| ISSN: |
2251-7200 |
| Popis: |
Respiratory movement and the motion range of the diaphragm can affect the quality and quantity of prostate images.This study aimed to investigate the magnitude of respiratory-induced errors to determine Dominant Intra- prostatic Lesions (DILs) in positron emission tomography (PET) images.In this simulation study, we employed the 4D NURBS-based cardiac-torso (4D-NCAT) phantom with a realistic breathing model to simulate the respiratory cycles of a patient to assess the displacement, volume, maximum standardized uptake value (SUVRespiration in a diaphragm motion resulted in the maximum superior-inferior displacement of 3.9 and 6.1 mm, and the diaphragm motion amplitudes of 20 and 35 mm. In a no-motion image, the volume measurement of DILs had the smallest percentage of errors. Compared with the no-motion method, the percentages of errors in the average method in 20 and 35 mm- diaphragm motion were 25% and 105%, respectively. The motion effect was significantly reduced in terms of the values of SUVThe respiratory movement errors in quantification and delineation of DILs were highly dependent on the range of motion, while the average method was not suitable to precisely delineate DILs in PET/CT in the dose-painting technique. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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