Comparison of myocardial perfusion scintigraphy and computed tomography (CT) angiography based on conventional coronary angiography

Taşdemir, Bekir; Balcı, Tansel Ansal; Demirel, Bedriye Büşra; Karaca, Ilgın; Aydin, Ayşe; Koç, Zehra Pınar

doi:10.4236/ns.2012.412126

Cited by 2 publications

(2 citation statements)

References 31 publications

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“…In cardiac SPECT, the most commonly used radiotracers are thallium-201 ( 201 Tl) and technetium-99m ( 99m Tc) labeled agents such as sestamibi and tetrafosmin. According to the literature, the sensitivity, specificity, and accuracy of cardiac SPECT varies from 71% to 98%, 33% to 89%, and 72% to 95%, respectively [ 22 , 23 ].…”

Section: A Comparison Of Various Filters In Cardiac Spect: Studiesmentioning

confidence: 99%

Filters in 2D and 3D Cardiac SPECT Image Processing

Lyra

Ploussi

Rouchota

et al. 2014

Cardiology Research and Practice

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Nuclear cardiac imaging is a noninvasive, sensitive method providing information on cardiac structure and physiology. Single photon emission tomography (SPECT) evaluates myocardial perfusion, viability, and function and is widely used in clinical routine. The quality of the tomographic image is a key for accurate diagnosis. Image filtering, a mathematical processing, compensates for loss of detail in an image while reducing image noise, and it can improve the image resolution and limit the degradation of the image. SPECT images are then reconstructed, either by filter back projection (FBP) analytical technique or iteratively, by algebraic methods. The aim of this study is to review filters in cardiac 2D, 3D, and 4D SPECT applications and how these affect the image quality mirroring the diagnostic accuracy of SPECT images. Several filters, including the Hanning, Butterworth, and Parzen filters, were evaluated in combination with the two reconstruction methods as well as with a specified MatLab program. Results showed that for both 3D and 4D cardiac SPECT the Butterworth filter, for different critical frequencies and orders, produced the best results. Between the two reconstruction methods, the iterative one might be more appropriate for cardiac SPECT, since it improves lesion detectability due to the significant improvement of image contrast.

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Section: A Comparison Of Various Filters In Cardiac Spect: Studiesmentioning

confidence: 99%

Filters in 2D and 3D Cardiac SPECT Image Processing

Lyra

Ploussi

Rouchota

et al. 2014

Cardiology Research and Practice

View full text Add to dashboard Cite

show abstract

“…[22–25] Different authors and different manufactures suggested different filters. [26,27] Though much work has been done, there are still considerable inconsistencies.…”

Section: Introductionmentioning

confidence: 99%

Wiener filter improves diagnostic accuracy of CAD SPECT images—comparison to angiography and CT angiography

et al. 2019

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Many discrepancy in selection of proper filter and its parameters for individual cases exists. The authors investigate the impact of the most common filters on patient NM images with coronary artery disease (CAD), and compare the results with the computerized tomography (CT)-Angio and angiography for accuracy.The investigation initiated by performing various single photon emission computerized tomography (SPECT)/CT scan of the national electrical manufacturers association chest phantoms having hot and cold inserts. Data acquired on GE 670 PRO SPECT/CT; 360Ø, 64 frames, 60 seconds, low energy high resolution (LEHR) 128, low energy general purpose (LEGP) with CT attenuation (120 kV and 170 mA). The images reconstructed with filtered back projection and ITERATIVE ordered-subset expectation maximization utilizing filters; Hann, Butterworth, Metz, Hamming, and Wiener. The Image contrast was calculated to assess absolute nearness of the inserts. Based on the preliminary results, then scans of 92 patients with CAD; 64 males and 28 females, age 41 to 77 years old, who had been reported earlier reprocessed with the nominated filter and were reported by 2 NM expert. The results compared to the earlier reports and to the CT–Angio and angiography.The optimization suggested 3 filters; Wiener (Wi), Metz and Butterworth (But) provide the highest contrast (99– 66.4%) and (81– 32%) for the cold and hot inserts respectively, with the (Wi) filter to be the better option. The reprocessed patients scan with the (Wi) presented an elevated diagnostic accuracy, correlated well with the CT-Angio and angiography results (P < .001 and r = 0.79 for [Wi] and P = .004 and r = 0.39 for [But]). The percentage of the false negative for moderate to severe CAD cases reported using Wi filter reduced from 27% to 7% and similarly for mild CAD cases from 7% to 1%.It appears the Wiener filter could produce results with the highest contrast for phantom imaging of various cold and hot spheres and for the patient data which is more consistent with angiography results, with much-elevated accuracy in intermediate cases (r = 0.79 for Wiener and r = 0.39 for Butterworth vs angiography). However, the optimum parameters obtained for the filters have no relation with the resolution of the imaging system, but the details of the objects could be improved.

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Comparison of myocardial perfusion scintigraphy and computed tomography (CT) angiography based on conventional coronary angiography

Cited by 2 publications

References 31 publications

Filters in 2D and 3D Cardiac SPECT Image Processing

Filters in 2D and 3D Cardiac SPECT Image Processing

Wiener filter improves diagnostic accuracy of CAD SPECT images—comparison to angiography and CT angiography

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