Magnetic Resonance Imaging of the Head and Neck

1986 ◽  
Vol 95 (1) ◽  
pp. 82-89 ◽  
Author(s):  
Shan R. Baker ◽  
Joseph T. Latack
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Head And Neck ◽  
Young Patients ◽  
Preoperative Assessment ◽  
Resonance Imaging ◽  
Axial Tomography ◽  
Computerized Axial Tomography ◽  
Magnetic Gradients ◽  
Definition Of

Magnetic resonance imaging (MR) has already gained wide acceptance in the evaluation of intracranial and spinal canal abnormalities. MR also provides excellent resolution of certain tumors of the head and neck and is particularly useful for the evaluation of neoplasms in the vicinity of the skull base. The absence of a bone signal prevents the streaking artifact so troublesome with computerized axial tomography (CT) and allows better definition of tumor. MR does not use ionizing radiation and appears to be an innocuous imaging mode—thus multiple examinations in young patients are not objectionable with MR. The ability to obtain images in multiple planes by control of the magnetic gradients allows for axial, sagittal, and coronal imaging, without changing the supine position of the patient. Multiple projections are helpful in providing better preoperative assessment of the extent and size of certain neoplasms Of the neck.

scholarly journals A selective review of current technology applicable to orofacial myology research

1988 ◽  
Vol 14 (3) ◽  
pp. 17-26
Author(s):  
Betty Wommack
Keyword(s):  
Magnetic Resonance Imaging ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Measurement Techniques ◽  
Nuclear Magnetic Resonance Imaging ◽  
Resonance Imaging ◽  
Axial Tomography ◽  
Current Technology ◽  
Airway Assessment ◽  
Computerized Axial Tomography

With advances in technology, measurement techniques have become more precise and accurate. Research instrumentation such as electromyography, kinesiography, cineradiography, videofluoroscopy, nuclear magnetic resonance imaging and computerized axial tomography, ultrasound, dynamic palatography and airway assessment instrumentation may offer avenues for investigation in orofacial myology.

Magnetic Resonance Imaging in the Diagnosis of Nonsquamous Tumors of the Head and Neck

1986 ◽  
Vol 19 (3) ◽  
pp. 523-536 ◽  
Author(s):  
Mahmood F. Mafee ◽  
Firooz Rasouli ◽  
Dimitrios G. Spigos ◽  
Galdino E. Valvassori ◽  
Michael Friedman ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Head And Neck ◽  
Resonance Imaging

Dynamic contrast‐enhanced magnetic resonance imaging for differentiating head and neck paraganglioma and schwannoma

Head & Neck ◽  
2021 ◽  
Author(s):  
Soumya Ranjan Malla ◽  
Ashu Seith Bhalla ◽  
Smita Manchanda ◽  
Devasenathipathy Kandasamy ◽  
Rakesh Kumar ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Head And Neck ◽  
Resonance Imaging ◽  
Dynamic Contrast Enhanced ◽  
Contrast Enhanced ◽  
Head And Neck Paraganglioma

scholarly journals Multiple b values of diffusion-weighted magnetic resonance imaging in evaluation of solid head and neck masses

2019 ◽  
Vol 50 (1) ◽  
Author(s):  
Rania Sobhy Abou khadrah ◽  
Haytham Haroon Imam
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Head And Neck ◽  
Resonance Imaging ◽  
Adc Value ◽  
Neck Masses ◽  
Adc Values ◽  
Weighted Magnetic Resonance Imaging ◽  
The Mean ◽  
Head And Neck Masses

Abstract Background Differentiation between malignant and benign masses is essential for treatment planning and helps in improving the prognosis of malignant tumors; the aim of this work is to determine the role of diffusion-weighted magnetic resonance imaging (DW-MRI) and the apparent diffusion coefficient (ADC) in the differentiation between benign and malignant solid head and neck masses by comparing diagnostic performance of low b values (0.50 and 400 s/mm2) versus high b values (800 and 1000 s/mm2) and comparing the result with histopathological finding. Results The study included 60 patients (34 male and 26 female) with solid head and neck masses > 1 cm who referred to radiodiagnosis department for MRI evaluation. Multiple b values were used 50, 400, 800, and 1000 s/mm2 (at least 2 b values). DWI and ADC value of all 60 patients were acquired. Mean ADC values of both malignant and benign masses were statistically measured and compared, and cut off value was determined. Solid head and neck masses in our study DWI with the use of high b value 800 and 1000 s/mm2 were of higher significance (P value 0.001*). There was a significant difference in the mean ADC value between benign and malignant masses (P < 0.01); solid masses were divided into 2 categories: (a) malignant lesions 46.7% (n = 28) with mean ADC value (0.82 ± 0.19) × 10−3 s/mm2 and (b) benign lesions 53.3% (n = 32) with mean ADC value (2.05 ± 0.46) × 10−3 s/mm2) with ADC cutoff value of 1.0 × 10−3 s/mm2 and 94% sensitivity, 93% specificity, negative predictive value (NPV) = 94%, positive predictive value (PPV) 93%, and an accuracy of 93.5%. Conclusion The DWI with ADC mapping were valuable as non-invasive tools in differentiating between benign and malignant solid head and neck masses. The use of high b value 800 and 1000 s/mm2 was of higher significance (P value 0.001*) in differentiation between benign and malignant lesion than that with low b values 0, 50, and 400 s/mm2 (0.01). The mean ADC values were significantly lower in malignant solid masses. Attention had to be paid to the choice of b values in MRI-DWI in the head and neck region.

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