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Reduction of Thoracic Aorta Motion Artifact With High-Pitch 128-Slice Dual-Source Computed Tomographic Angiography: A Historical Control Study

Nakagawa, Junichiro MD; Tasaki, Osamu MD, PhD; Watanabe, Yoshiyuki MD, PhD; Azuma, Takeo AD, RT; Ohnishi, Mitsuo MD, PhD; Ukai, Isao MD; Tahara, Kenichi MD; Ogura, Hiroshi MD, PhD; Kuwagata, Yasuyuki MD, PhD; Hamasaki, Toshimitsu PhD; Shimazu, Takeshi MD, PhD

Journal of Computer Assisted Tomography: September/October 2013 - Volume 37 - Issue 5 - p 755–759
doi: 10.1097/RCT.0b013e31829c3f76
Thoracic and Cardiovascular Imaging

Objectives Electrocardiogram-gated imaging combined with multi–detector row computed tomography (MDCT) has reduced cardiac motion artifacts, but it was not practical in the emergency setting. The purpose of this study was to evaluate the ability of a high-pitch, 128-slice dual-source CT (DSCT) scanner to reduce motion artifacts in patients admitted to the emergency room.

Methods This study comprised 100 patients suspected of having thoracic aorta lesions. We examined 47 patients with the 128-slice DSCT scanner (DSCT group), and 53 patients were examined with a 64-slice MDCT scanner (MDCT group). Six anatomic areas in the thoracic aorta were evaluated.

Results Computed tomography images in the DSCT group were distinct, and significant differences were observed in images of all areas between the 2 groups except for the descending aorta.

Conclusions The high-pitch DSCT scanner can reduce motion artifacts of the thoracic aorta and enable radiological diagnosis even in patients with tachycardia and without breath hold.

From the *Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka; †Department of Emergency Medicine, Unit of Clinical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki; ‡Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, Osaka; §Division of Radiology, Department of Medical Technology, Osaka University Hospital, Osaka; ∥Department of Emergency Medical Center, Hyogo Prefectural Nishinomiya Hospital, Hyogo; and ¶Department of Biomedical Statistics, Osaka University Graduate School of Medicine, Osaka, Japan.

Received for publication April 3, 2012; accepted May 15, 2013.

Reprints: Osamu Tasaki, MD, PhD, Department of Emergency Medicine, Unit of Clinical Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki-shi, 852-8501, Japan (e-mail: tasaki-o@nagasaki-u.ac.jp).

The authors declare that they have no competing interests.

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