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INTRODUCTION Recent developments of diffusion-weighted magnetic resonance imaging (DWI) make it possible to image malignant tumors to provide tissue contrast based on difference in the diffusion of water molecules among tissues, which can be measured by apparent diffusion coefficient (ADC) value. The aim of this study is to examine the usefulness of DWI for(More)
OBJECTIVE It is sometimes difficult to distinguish between primary central nervous system lymphomas (PCNSL) and glioblastoma multiforme (GBM). The aim of this study was to investigate whether the addition of (18)F-2-fluoro-2-deoxy-D: -glucose positron emission tomography ([(18)F]FDG-PET) and apparent diffusion coefficients (ADC) to conventional MRI improves(More)
PURPOSE To evaluate the impact of 18F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) imaging on nodal staging for head-and-neck squamous cell carcinoma (SCC). METHODS AND MATERIALS The study population consisted of 23 patients with head-and-neck SCC who were evaluated with FDG-PET/CT and went on to neck dissection. Two(More)
OBJECTIVE Intraoperative frozen section examination of sentinel lymph nodes was conducted to determine the final indication for segmentectomy for clinical T1 N0 M0 non-small cell lung cancer. METHODS Between April 2005 and July 2006, 52 patients with clinical T1 N0 M0 non-small cell lung cancer were prospectively treated by segmentectomy with sentinel(More)
OBJECTIVE This retrospective analysis examined whether diffusion-weighted magnetic resonance imaging might be as useful as positron emission tomography with fludeoxyglucose F 18 for (1) discriminating between non-small cell lung cancer and benign pulmonary nodules and (2) predicting aggressiveness of non-small cell lung cancer. METHODS Diffusion-weighted(More)
BACKGROUND The advantages and disadvantages of technetium Tc 99m tin colloid and technetium Tc 99m phytate as tracers for sentinel node (SN) identification in patients with clinical stage I non-small cell lung cancer were examined retrospectively. METHODS Sentinel node identification was conducted using tin colloid and phytate, respectively, in 73 and 74(More)
Institutional review board approval was obtained for multiple imaging examinations in healthy volunteers and patients and for the analysis of images. The purpose of the study, and the risks associated with radiation exposure with regard to stochastic effects that might result in cancer and/or genetic mutations, were explained to all subjects, and all(More)
OBJECTIVE The purpose of this study was to develop a method of fused images of coronary CT angiography and myocardial perfusion SPECT. CONCLUSION Four patients with ischemic heart disease underwent 3D volume-rendering fused images using a conversion program and volume-rendering fusion function of a computer workstation. The fusion images clearly showed(More)
PURPOSE To evaluate retrospectively if there is additional diagnostic value of fused single photon emission computed tomographic (SPECT) and computed tomographic (CT) images in assessing possible bone metastases. MATERIALS AND METHODS Institutional review board approval was obtained, and each patient provided written informed consent. Bone(More)
OBJECTIVE Attenuation artifacts adversely affect the diagnostic accuracy of myocardial perfusion imaging. We assessed the clinical usefulness of X-ray CT based attenuation correction (AC) in patients undergoing myocardial perfusion imaging by comparing their myocardial AC- and non-corrected (NC) SPECT images with the coronary angiography (CAG). METHODS We(More)