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453 results on '"Ito, Katsuhide"'

46. Risk Factors for Severity of Pneumothorax after CT-Guided Percutaneous Lung Biopsy using the Single-Needle Method

Author

Kakizawa, Hideaki, Toyota, Naoyuki, Hieda, Masashi, Hirai, Nobuhiko, Tachikake, Toshihiro, Matsuura, Noriaki, Oda, Miyo, and Ito, Katsuhide

Subjects
Biopsy, respiratory system, Complication, Computed tomography (CT), Lung, respiratory tract diseases
Abstract

The purpose of this study is to evaluate the risk factors for the severity of pneumothorax after computed tomography (CT)-guided percutaneous lung biopsy using the single-needle method. We reviewed 91 biopsy procedures for 90 intrapulmonary lesions in 89 patients. Patient factors were age, sex, history of ipsilateral lung surgery and grade of emphysema. Lesion factors were size, location and pleural contact. Procedure factors were position, needle type, needle size, number of pleural punctures, pleural angle, length of needle passes in the aerated lung and number of harvesting samples. The severity of pneumothorax after biopsy was classified into 4 groups: "none", "mild", "moderate" and "severe". The risk factors for the severity of pneumothorax were determined by multivariate analyzing of the factors derived from univariate analysis. Pneumothorax occurred in 39 (43%) of the 91 procedures. Mild, moderate, and severe pneumothorax occurred in 24 (26%), 8 (9%) and 7 (8%) of all procedures, respectively. Multivariate analysis showed that location, pleural contact, number of pleural punctures and number of harvesting samples were significantly associated with the severity of pneumothorax (p

Published
2010

47. Variability of Repeated Coronary Artery Calcium Scoring and Radiation Dose on 64-slice and 16-slice CT by Prospective Electrocardiograph-triggered Axial and Retrospective Electrocardiograph-gated Spiral CT : A Phantom Study

Author

Horiguchi, Jun, Kiguchi, Masao, Fujioka, Chikako, Shen, Yun, Arie, Ryuichi, Sunasaka, Kenichi, Kitagawa, Toshiro, Yamamoto, Hideya, and Ito, Katsuhide

Subjects
calcium, coronary artery, radiation dose, CT
Abstract

Rationale and Objectives: To compare coronary artery calcium scores, the variability and radiation doses on 64-slice and 16-slice CT scanners by both prospective electrocardiograph (ECG)-triggered and retrospective ECG-gated scans. Materials and Methods: Coronary artery models (n=3) with different plaque CT densities (~240 HU, ~600 HU and ~1000 HU) of four sizes (1 mm, 3 mm, 5 mm and 10 mm in length) on a cardiac phantom were scanned three times in 5 heart rate sequences. The tube current-time-products were set to almost the same on all four protocols (32.7 mAs for 64-slice prospective and retrospective scans, 33.3 mAs for 16-slice prospective and retrospective scans). Slice-thickness was set to 2.5 mm in order to keep the radiation dose low. Overlapping reconstruction with 1.25 mm increment was applied on the retrospective ECG-gated scan. Results: The coronary artery calcium scores were not different between the four protocols (one-factor ANOVA, Agatston; p=0.32, volume; p=0.19 and mass; p=0.09). Two-factor factorial ANOVA test revealed that the interscan variability was different between protocols (p

Published
2008

48. Gynecologic Abscess : CT-guided Percutaneous Drainage

Author

Kakizawa, Hideaki, Toyota, Naoyuki, Hieda, Masashi, Hirai, Nobuhiko, Tachikake, Toshihiro, Matsuura, Noriaki, Fujimura, Yoshio, Kodama, Ichiro, Hirata, Eiji, Hara, Tetsuaki, and Ito, Katsuhide

Subjects
Gynecologic organs, Percutaneous drainage, Abscess, CT
Abstract

A 42-year-old woman with recurrent bilateral endometrial ovarian cystoma presented with fever and pelvic pain caused by a tubo-ovarian abscess (TOA), which was resistant to several varieties of intravenous and oral antibiotics for 2 weeks (Case 1). Computed tomography (CT)-guided diagnostic aspiration for a rapid enlarged right ovarian cystoma through a transabdominal route confirmed that it had developed into a TOA. Subsequent percutaneous abscess drainage (PAD) and irrigation for 3 days were successful. One-year follow-up revealed no recurrence of TOA. A 58-year-old woman with recurrent cervical cancer after external radiation therapy (RT) presented with fever, confusion and tremor caused by pyometra (Case 2). Since transvaginal drainage was impossible due to cervical os obstruction, the patient had undergone CT-guided transabdominal PAD and irrigation for a month. Thereafter, the clinical findings improved and a tracheloplasty was performed to prevent recurrence. CT-guided PAD may be a useful treatment option for gynecologic abscess as a diagnostic aspiration, a temporizing procedure until surgery, or an alternative surgery.

Published
2006

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