Keiichi Nishikawa

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BACKGROUND Recently, molecular therapies targeting epidermal growth factor receptor (EGFR) have been developed for clinical use. The current study was conducted to determine 1) the exact frequency of EGFR protein overexpression, 2) the correlation between protein overexpression and EGFR amplification, and 3) the correlation between the status of the genetic(More)
PURPOSE To evaluate the relationship between SUVmax of primary lung cancers on FDG-PET and lymph node metastasis. METHOD AND MATERIALS The subjects were a total of consecutive 66 patients with lung cancer who were examined by FDG-PET and subsequently underwent surgery between October 2004 and January 2008. There were 41 males and 25 females, ranging in(More)
OBJECTIVE The aim was to investigate the relationship between the appearance of double contours on the mandibular condyle and changes in articular disc position after splint therapy. STUDY DESIGN Panoramic radiographs and magnetic resonance images of 82 joints in 41 patients taken before and after treatment were studied. The number of cases showing a(More)
The purpose of this study was to investigate digital subtraction technique in digital dental imaging for implant performance, used to quantitatively evaluate bone change around dental implants. For longitudinal assessment of peri-implant bone change, we applied subtraction technique to digital peri-apical radiographs using a digital dental imaging system in(More)
PURPOSE To compare diagnostic capability of preoperative N-staging of lung cancer between thin-section CT of the mediastinum and FDG PET, and 5mm slice thickness CT. MATERIALS AND METHODS The subjects were 34 patients with lung carcinoma who were examined by both CT and PET, and subsequently underwent surgery between May 2005 and January 2007. CT was(More)
Docetaxel is a novel, potentially highly beneficial drug for the treatment of lung cancer, and has shown remarkable radio-sensitizing effects in vitro. In the present study, we evaluated whether weekly docetaxel (20 mg/m(2)) and conventionally fractionated radiotherapy with the two-dimensional (2D) technique could be tolerated and effective in the treatment(More)
OBJECTIVE The purpose of this study was to determine the potential of fluid-attenuated inversion recovery (FLAIR) sequence images in the identification of joint effusion (JE) compared with T2-weighted images. STUDY DESIGN A total of 31 joints (28 patients) with JE were investigated by magnetic resonance imaging (MRI). Regions of interest were placed over(More)
The purpose of this research was to determine a potential reference point for measurement of signal intensity of bone marrow of the condyle on proton density-weighted images (PDW) prior to analysis of bone marrow abnormality related to symptomatic osteoarthritis of the temporomandibular joint (TMJ). The study was based on 79 joints in 41 patients. The(More)
This study compared Ultra Speed Occlusal Film (USOF) and 3 digital systems in determining the radiopacity of 5 different restorative resins in terms of equivalents of aluminum thickness. Whether those digital systems could be used to determine whether radiopacity was in line with International Organization for Standardization (ISO) recommendations was also(More)
The purpose of this study was to verify whether application of a quantitative computed tomography (QCT) technique was helpful for quantitative measurement of bone density using dental cone-beam CT (CBCT). The left mandible of an opened-mouth head phantom was scanned with a dental CBCT machine at several tube voltages. A bone mineral contents phantom(More)