Ayano Kikuyama

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RATIONALE AND OBJECTIVES To evaluate thin-section computed tomography (CT) images of the lung reconstructed using adaptive statistical iterative reconstruction (ASIR) on standard- and reduced-dose CT. MATERIALS AND METHODS Eleven cadaveric lungs were scanned by multidetector-row CT with two different tube currents (standard dose, 400 mA; reduced dose, 10(More)
PURPOSE To evaluate the effects of ASIR on CAD system of pulmonary nodules using clinical routine-dose CT and lower-dose CT. MATERIALS AND METHODS Thirty-five patients (body mass index, 22.17 ± 4.37 kg/m(2)) were scanned by multidetector-row CT with tube currents (clinical routine-dose CT, automatically adjusted mA; lower-dose CT, 10 mA) and X-ray voltage(More)
OBJECTIVE The purpose of this study was to evaluate the diagnostic accuracy of bronchoscopy with virtual bronchoscopy (VB) navigation. PATIENTS AND METHODS Forty-two consecutive patients with ≤30-mm diameter peripheral pulmonary shadows or lesions that were difficult or impossible to identify on plain x-rays regardless of size were selected. Before(More)
OBJECTIVE We investigated the image quality of multiplanar reconstruction (MPR) using adaptive statistical iterative reconstruction (ASIR). METHODS Inflated and fixed lungs were scanned with a garnet detector CT in high-resolution mode (HR mode) or non-high-resolution (HR) mode, and MPR images were then reconstructed. Observers compared 15 MPR images of(More)
PURPOSE To evaluate the image quality of both standard- and reduced-dose computed tomography (CT) by comparing multidetector CT with garnet-based detectors with multidetector CT with conventional detectors. MATERIALS AND METHODS The study was approved by the internal ethics review board. Informed consent was obtained. Eleven cadaveric lungs inflated and(More)
OBJECTIVES This study aimed to evaluate whether dual-energy computed tomography can reduce metal artifacts and improve detection of pulmonary nodules. METHODS Twelve simulated nodules were randomly placed inside a chest phantom with a pacemaker. Then, dual-energy computed tomography was performed, and 5 virtual monochromatic images at 40, 50, 65, 100, and(More)
In 1980, extracorporeal shock wave lithotripsy (ESWL) was incorporated as a nonsurgical method of stone removal in the cases of nephrolithiasis and rapidly found worldwide acceptance. Several devices commonly designated "second generation" lithotripters vs "first generation" Dornier HM3 are now under experimental or clinical trial. We report our clinical(More)
We performed a study to compare the usefulness of double or single anticancer agents in the prophylactic treatment after the transurethral resection (TUR) of superficial bladder cancer. We experienced 127 superficial bladder cancer cases. Of these cases, 42 were treated with intravesical adriamycin (ADR) and peplomycin (PEP), 56 with ADR, PEP, epirubicin(More)
RATIONALE AND OBJECTIVES The aims of this study were to compare diagnostic accuracy between computed tomography (CT)-guided percutaneous cutting needle biopsy (PCNB) and surgery or open biopsy for thymic epithelial tumors in accordance with the World Health Organization (WHO) classification and to evaluate computed tomographic diagnosis additionally. (More)
RATIONALES AND OBJECTIVES To evaluate the image quality of 320-row wide-volume (WV) computed tomography (CT) scans in comparison with 64-row helical scans for the lung. MATERIALS AND METHODS The Institutional Review Board of each institution approved this prospective, multicenter study and informed consent was obtained. A total of 73 subjects underwent(More)