Dissertation
Dissertation > Medicine, health > Clinical > Diagnostics > Diagnostic Imaging

Posterior Belly of Digastric Muscle and Its Shift: Imaging Anatomy Study and Its Significance

Author XuLeiMing
Tutor ZhangShiZheng
School Zhejiang University
Course Medical Imaging and Nuclear Medicine
Keywords Parotid Parapharyngeal Tumor Tomography X-ray computed Magnetic resonance imaging Digastric
CLC R445
Type PhD thesis
Year 2005
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The purpose of carrying out the digastric belly Imaging anatomy study on its shift on the significance of the identification the parotid gap with parapharyngeal space tumors . Method 2 cadaveric neck anatomy revealed digastric belly full-length , with X ray opaque catheter ( CT scan ) or vitamin E capsules ( MRI scan ) mark the muscle specimens by the body supine position on the scanning bed, line cross-sectional CT scans and three-dimensional MRI scans . Abdominal imaging findings confirm digastric flag . Ventral direction along the digastric direct scanning and three - dimensional CT reconstruction , and explore better image display method of the muscle . Two normal volunteers, consistent method of imaging Imaging anatomy study , compared with the corpse results . Retrospective analysis of clinical and imaging parotid or parapharyngeal space tumors in 45 cases , all cases were confirmed by pathology . In the axial plane of the image , according to the posterior belly of the lesions and the digastric and shift the relationship to confirm the origin of the tumor clearance , and compared with surgical findings . Based on the above , the region of 26 patients with tumor prospective study . According to the direction of displacement of the posterior belly of digastric , to confirm the origin of the tumor clearance and pathologic results . Results of cadaver and two normal volunteers anatomical imaging studies have shown that conventional imaging cross-sectional mandibular condyle slightly after the coronal plane , computer tomography (CT) can be displayed exactly and identify the posterior belly of digastric ; along the digastric direct scanning and three - dimensional reconstruction of the posterior belly of the muscle better . Retrospective study , 27 cases of parotid space tumors are located in the superficial surface of the posterior belly of digastric , the digastric after intra-abdominal shift ; 18 cases of parapharyngeal space tumors are located deep surface of the posterior belly of digastric , the digastric after ventrolateral push . Prospective study of 26 cases , 15 cases of digastric intra-abdominal shift , both parotid tumor of origin ; 11 cases of the muscle the relocation are parapharyngeal space tumors of origin , most of the neck

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