Diffusion-weighted imaging and the apparent diffusion coefficient on 3T MR imaging in the differentiation of craniopharyngiomas and germ cell tumors
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- 作者：Yasuyuki Kinoshita ; Fumiyuki Yamasaki ; Atsushi Tominaga…
- 关键词：Craniopharyngioma ; Germ cell tumor ; Diffusion ; weighted imaging ; Apparent diffusion coefficient ; High b value
- 刊名：Neurosurgical Review
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：39
- 期：2
- 页码：207-213
- 全文大小：669 KB
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Fumiyuki Yamasaki (1)
Atsushi Tominaga (1)
Megu Ohtaki (2)
Satoshi Usui (1)
Kazunori Arita (3)
Kazuhiko Sugiyama (4)
Kaoru Kurisu (1)
1. Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
2. Department of Environmetrics and Biometrics, Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
3. Department of Neurosurgery, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
4. Department of Clinical Oncology and Neuro-oncology Program, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan - 刊物类别：Medicine
- 刊物主题：Medicine & Public Health
Neurosurgery - 出版者：Springer Berlin / Heidelberg
- ISSN：1437-2320
文摘
The apparent diffusion coefficient (ADC) on diffusion-weighted imaging (DWI) plays an important role in diagnosing intracranial tumors and predicting the histopathological grade of the tumor. However, the differences in the ADC values between craniopharyngiomas and germ cell tumors (GCTs) have not been clarified. We therefore evaluated the DWI and ADC values at b = 1000 and b = 4000 s/mm2 on 3T magnetic resonance (MR) imaging and assessed the possibility of differentiating between craniopharyngiomas and GCTs. We retrospectively reviewed 19 patients with craniopharyngioma and 24 patients with GCT who underwent surgery and received a histopathological diagnosis. Thirty-four patients underwent DWI with b = 1000 and b = 4000 s/mm2 and nine patients underwent periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) DWI with b = 1000 s/mm2. The ADC was determined by manually placing regions of interests (ROIs) in the respective tumor regions on the ADC maps and is expressed as the minimum (ADCMIN), mean (ADCMEAN), and maximum (ADCMAX) absolute values. The craniopharyngiomas showed lower intensity on DWI at b = 1000 and b = 4000 s/mm2 than the GCTs. Furthermore, the craniopharyngiomas demonstrated significantly high ADC values (ADCMIN, ADCMEAN, and ADCMAX) in comparison with the GCTs on DWI at b = 1000 and b = 4000 s/mm2. The logistic discriminant analysis clarified the advantage of ADCMIN at b = 4000 s/mm2 in differentiating between craniopharyngiomas and GCTs compared with the other ADC values. DWI and the ADC values may help clinicians to differentiate between craniopharyngiomas and GCTs. The ADCMIN at b = 4000 s/mm2 is particularly useful for differentiation.