Automatic pharynx and larynx cancer segmentation framework (PLCSF) on contrast enhanced MR images

Purpose. To investigate the correlation of Apperent Diffusion Coefficient (ADC) values in invasive ductal breast carcinomas with detailed histologic features and enhancement ratios on dynamic contrast-enhanced MRI.Methods and Materials. Dynamic MR images and diffusion-weighted images (DWIs) of invasive ductal breast carcinomas were reviewed in 25 (26 lesions) women. In each patient, DWI, T2WI, T1WI, and dynamic images were obtained. The ADC values of the 26 carcinomas were calculated with b-factors of 0 and 1000 s/ using echoplanar DWI. Correlations of the ADC values were examined on dynamic MRI with enhancement ratios (early to delayed phase: E/D ratio) and detailed histologic findings for each lesion, including cellular density, the size of cancer nests, and architectural features of the stroma (broad, narrow, and delicate) between cancer nests.Results. The mean ADC was /sec. Cellular density was significantly correlated with ADC values () and E/D ratios (). The ADC values were also significantly correlated to features of the stroma (broad to narrow, ).Conclusion. The findings suggest that DWIs reflect the growth patterns of carcinomas, including cellular density and architectural features of the stroma, and E/D ratios may also be closely correlated to cellular density.

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Diagnostic value of dynamic contrast-enhanced MRI for unilocular cystic-type ameloblastomas with homogeneously bright high signal intensity on T2-weighted or STIR MR images

Oral Oncology ◽

10.1016/j.oraloncology.2010.11.009 ◽

2011 ◽

Vol 47 (2) ◽

pp. 147-152 ◽

Cited By ~ 16

Author(s):

Miki Hisatomi ◽

Yoshinobu Yanagi ◽

Hironobu Konouchi ◽

Hidenobu Matsuzaki ◽

Toshihiko Takenobu ◽

...

Keyword(s):

Signal Intensity ◽

Diagnostic Value ◽

High Signal Intensity ◽

High Signal ◽

Mr Images ◽

Dynamic Contrast Enhanced Mri ◽

Dynamic Contrast Enhanced ◽

Contrast Enhanced ◽

Cystic Type ◽

Contrast Enhanced Mri

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An Enhanced Fuzzy Segmentation Framework for extracting white matter from T1-weighted MR images

Biomedical Signal Processing and Control ◽

10.1016/j.bspc.2021.103093 ◽

2022 ◽

Vol 71 ◽

pp. 103093

Author(s):

S. Vinurajkumar ◽

S. Anandhavelu

Keyword(s):

White Matter ◽

Mr Images ◽

Segmentation Framework ◽

Fuzzy Segmentation

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A Case of Schwannoma of the Submandibular Region

The Open Dentistry Journal ◽

10.2174/1874210601812010012 ◽

2018 ◽

Vol 12 (1) ◽

pp. 12-18 ◽

Cited By ~ 1

Author(s):

Babatunde O. Bamgbose ◽

Akiko Sato ◽

Yoshinobu Yanagi ◽

Miki Hisatomi ◽

Yohei Takeshita ◽

...

Keyword(s):

Diagnostic Imaging ◽

Hypoglossal Nerve ◽

Salivary Gland Tumor ◽

Dynamic Mri ◽

Final Diagnosis ◽

Mr Images ◽

Submandibular Region ◽

Contrast Enhanced ◽

Mobile Mass ◽

Ct And Mri

Background:We herein described a rare case of schwannoma of the hypoglossal nerve in the submandibular region with diagnostic imaging and histopathological findings.Case Report:A 31-years-old woman has had a palpable firm, rubbery, freely mobile mass in the submandibular region. Of imaging, MR images showed homogeneous isointensity on T1-weighted imaging (T1-WI), heterogeneous hypointensity on T2-WI, heterogeneous hyperintensity on short T1 inversion recovery (STIR), and heterogeneous enhancement on contrast-enhanced T1-WI. A clear capsule was observed on the margin and showed hypointense on T2-WI. Dynamic MRI showed heterogeneous gradual increased enhancement. The uptake of contrast medium was regionally slow. Diagnostic imaging using CT and MRI was suspected of salivary gland tumor or neurogenic tumor. In consideration of imaging diagnosis, a pleomorphic adenoma or a schwannoma was suspected. Final diagnosis was confirmed on the basis of histopathological finding and intraoperative findings.Conclusion:1. Histopathologic examination is inevitable, because MR findings are not specific.2. Schwannomas were said to have specific MRI properties, including specific signs (split-fat sign, fascicular sign, target sign). However, they are not always observed.3. This case confirmed the differential diagnosis on the basis of the intraoperative finding that the tumor was continuous with the hypoglossal nerve.

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