کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5985090 1178712 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of myocardial perfusion from vasodilator stress computed tomography: Does improvement in image quality by iterative reconstruction lead to improved diagnostic accuracy?
ترجمه فارسی عنوان
تجزیه و تحلیل پرفیوژن قلب از توموگرافی تنفسی وازودیلاتور: آیا بهبود کیفیت تصویر با بازسازی تکراری موجب بهبود دقت تشخیصی می شود؟
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی کاردیولوژی و پزشکی قلب و عروق
چکیده انگلیسی

BackgroundIterative reconstruction (IR) in cardiac CT has been shown to improve confidence of interpretation of noninvasive coronary CT angiography (CTA).ObjectiveWe hypothesized that IR would also improve the quality of vasodilator stress coronary CT images acquired with low tube voltage to assess myocardial perfusion and the accuracy of the detection of perfusion abnormalities by using quantitative 3-dimensional (3D) analysis.MethodsWe studied 39 consecutive patients referred for coronary CTA (256-slice scanner; Philips), who underwent additional imaging (100 kV, prospective gating) with regadenoson (0.4 mg; Astellas). Stress images were reconstructed with different algorithms: filtered back projection (FBP) and IR (iDose; Philips). Image quality was quantified by signal-to-noise and contrast-to-noise ratios in the blood pool and the myocardium. Then, FBP and separately IR images were analyzed with custom 3D analysis software to quantitatively detect perfusion defects. Accuracy of detection was compared with perfusion abnormalities predicted by coronary stenosis >50% on coronary CTA.ResultsFive patients with image artifacts were excluded. In the remaining 34 patients, both signal-to-noise and contrast-to-noise ratios increased with IR, indicating improvement in image quality compared with FBP. For 3D perfusion analysis, 10 patients with normal coronary arteries were used as a reference to correct for x-ray attenuation variations in normal myocardium. In the remaining 24 patients, reduced noise levels in the IR images compared with FBP resulted in tighter attenuation distribution and improved detection of perfusion abnormalities.ConclusionIR significantly improves image quality on regadenoson stress CT images acquired with low tube voltage, leading to improved 3D quantitative evaluation of myocardial perfusion.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cardiovascular Computed Tomography - Volume 8, Issue 3, May–June 2014, Pages 238-245
نویسندگان
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