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DOI:10.2214/AJR.06.5087.1
AJR 2006; 187:W663
© American Roentgen Ray Society

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Mecit Kantarci and Ednan Bayram

Atatürk University Erzurum, Turkey



 
WEB—This is a Web exclusive article.

We thank Drs. Nakaura, Awai, and Yamashita for their comments related to our article [1]. It is likely (from previous studies) that myocardial bridging incidence may be higher in pathology studies [2]. In our study, at first, we investigated the presence of myocardial bridging on axial images. Later, we checked suspicious regions on the sagittal plane as well. The shifting of coronary arteries onto the myocardium (by myocardial fibers) was important in order to diagnose myocardial bridging on sagittal images. Perhaps we may have failed to detect superficial myocardial bridges that do not cause shifting because of limitations in spatial resolution of our 16-MDCT scanner.

Nakaura et al. found a higher myocardial bridging incidence (23.9%) using a 40-MDCT scanner in their study than that of our study (3.5%). We believe that this difference may result from the difference in the number of detectors for the scanners used. The incidence with a 64- or 256-detector scanner may be higher and may even be as high as the level of incidences reported in pathology studies because spatial resolution is increased with the number of detectors.


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  1. Kantarci M, Duran C, Durur I, et al. Detection of myocardial bridging with ECG-gated MDCT and multiplanar reconstruction. AJR 2006; 186(6 suppl 2): S391-S394[Abstract/Free Full Text]
  2. Mohlenkamp S, Hort W, Ge J, Erbel R. Update on myocardial bridging. Circulation 2002;206 : 2616-2622

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