Usefulness of diffusion‐weighted MRI with echo‐planar technique in the evaluation of cellularity in gliomas

…, I Ikushima, Y Shigematu, T Hirai… - Journal of Magnetic …, 1999 - Wiley Online Library
The purpose of this study was to evaluate the utility of diffusion‐weighted magnetic resonance
imaging (MRI) with echo‐planar imaging (EPI) technique in depicting the tumor cellularity …

Diffusion-weighted imaging of radiation-induced brain injury for differentiation from tumor recurrence

C Asao, Y Korogi, M Kitajima, T Hirai… - American Journal …, 2005 - Am Soc Neuroradiology
BACKGROUND AND PURPOSE: Differentiation between tumor recurrence and treatment-related
brain injury is often difficult with conventional MRI. We hypothesized that the diffusion-…

Clinical quantitative susceptibility mapping (QSM): biometal imaging and its emerging roles in patient care

…, BH Kopell, MG Kaplitt, D Devos, T Hirai… - Journal of magnetic …, 2017 - Wiley Online Library
Quantitative susceptibility mapping (QSM) has enabled magnetic resonance imaging (MRI)
of tissue magnetic susceptibility to advance from simple qualitative detection of hypointense …

Prospective evaluation of suspected stenoocclusive disease of the intracranial artery: combined MR angiography and CT angiography compared with digital …

T Hirai, Y Korogi, K Ono, M Nagano… - American Journal …, 2002 - Am Soc Neuroradiology
BACKGROUND AND PURPOSE: MR angiography is primarily and increasingly used to
assess intracranial arterial stenoocclusion. However, MR angiography can cause …

Monitoring therapeutic responses of primary bone tumors by diffusion-weighted image: initial results

…, Y Nakayama, O Shimomura, M Kitajima, T Hirai… - European …, 2006 - Springer
The purpose of our study was to investigate whether quantitative diffusion-weighted images
(DWI) were useful for monitoring the therapeutic response of primary bone tumors. We …

Grading Astrocytic Tumors by Using Apparent Diffusion Coefficient Parameters: Superiority of a One- versus Two-Parameter Pilot Method1

R Murakami, T Hirai, T Sugahara, H Fukuoka, R Toya… - Radiology, 2009 - pubs.rsna.org
Purpose: To assess the utility of both minimum apparent diffusion coefficients (ADCs) and
ADC difference values for grading astrocytic tumors at magnetic resonance imaging. Materials …

Role of diffusion-weighted imaging in the diagnosis of gynecological diseases

T Namimoto, K Awai, T Nakaura, Y Yanaga, T Hirai… - European …, 2009 - Springer
Recent technical advances in diffusion-weighted imaging (DWI) greatly enhanced the clinical
value of magnetic resonance imaging (MRI) of the body. DWI can provide excellent tissue …

Combined use of T2-weighted and diffusion-weighted 3-T MR imaging for differentiating uterine sarcomas from benign leiomyomas

…, Y Yamashita, K Awai, T Nakaura, Y Yanaga, T Hirai… - European …, 2009 - Springer
The objective of our study was to compare diffusion-weighted imaging (DWI) alone and DWI
combined with T2-weighted MRI for the differentiation of uterine sarcomas from benign …

Malignant Supratentorial Astrocytoma Treated with Postoperative Radiation Therapy: Prognostic Value of Pretreatment Quantitative Diffusion-weighted MR Imaging1

R Murakami, T Sugahara, H Nakamura, T Hirai… - Radiology, 2007 - pubs.rsna.org
Purpose: To retrospectively evaluate whether the minimum apparent diffusion coefficient (ADC)
of the tumor seen on pretreatment magnetic resonance (MR) images is of prognostic …

Impact of FDG-PET/CT imaging on nodal staging for head-and-neck squamous cell carcinoma

R Murakami, H Uozumi, T Hirai, R Nishimura… - International Journal of …, 2007 - Elsevier
Purpose: To evaluate the impact of 18F-fluorodeoxyglucose positron emission tomography/computed
tomography (FDG-PET/CT) imaging on nodal staging for head-and-neck …