Some soft-tissue neck abnormalities are best assessed with neither x-ray nor CT but rather with ultrasound, magnetic resonance imaging (MRI), fluoroscopy, or techniques such as bronchoscopy and esophagoscopy. First we consider some general principles regarding the available imaging modalities: x-ray...
Without the use of contrast medium, vascular morphology can be easily delineated on gradient-echo (GRE) sequences ( Vogl et al. 1994a). Although computed tomography (CT) is superior in the assessment of osseous and air-filled structures, contrast-enhanced MRI is of major value in delineating...
The routine use of computed tomography (CT) or MRI is not recommended. ○ CT of the neck may be used when resection of the thyroid gland is planned as a preoperative study; however, contrast should not be used. ○ Contrast may lead to intense and prolonged enhancement of the thyroid, cau...
Ring enhancement of a hypodense region on a contrast CT scan is indicative of an abscess. MRI is excellent for distinguishing fine detail within soft tissue and in the evaluation of vascular lesions of the neck. Finally, ultrasonography is helpful in distinguishing solid and cystic masses and ...
MR aortography was performed on a 1.5 Tesla MRI using a special head-and-neck coil. Images were obtained using an overlapping multi-slab and three-dimensional time-of-flight technique. Of the 422 patients, 59 underwent conventional angiography, and the findings from their conventional arterio...
Staging should be completed at this point including head and neck exam, biopsy taken during panendoscopy under general anesthesia, ultrasonography of the neck, MRI (recommended) or CT scan with intravenous contrast of primary and neck and exclusion of distant metastasis according to local routine inc...
Dynamic contrast- enhanced magnetic resonance imaging for head and neck cancers Joint Head and Neck Radiotherapy-MRI Development Cooperative* Received: 12 October 2017 Accepted: 18 December 2017 Published: 13 February 2018 Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) has been correlated...
Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) has been correlated with prognosis in head and neck squamous cell carcinoma as well as with changes in normal tissues. These studies implement different software, either commercial or in-house, and different scan protocols. Thus, the gen...
Varying results have been reported for Ga-67 inhead and neck tumors. Sensitivity for tumor detection ranges from 56–86%. MRI andCTare the primary modalities for diagnosis. The prognosis is poor for patients with gallium avid residual masses after treatment. However,PETis better able to stage ...
Jonathan Clark, Marie Ranson, Bing Yu, Sandra O'Toole. The Chris O'Brien Lifehouse (LH), Camperdown, New South Wales, Australia; Royal Prince Alfred Hospital (RPAH), Camperdown, New South Wales, Australia; Illawarra Health and Medical Research Institute (IHMRI), Wollongong, New South Wales...