Combined influence of quantum iterative reconstruction level and kernel sharpness on image quality in photon counting CT angiography of the upper leg

被引:0
作者
Krompass, Kristina [1 ]
Goldbrunner, Florian Andreas [1 ]
Hartung, Viktor [1 ]
Erguen, Sueleyman [2 ]
Peter, Dominik [3 ]
Hendel, Robin [1 ]
Huflage, Henner [1 ]
Patzer, Theresa Sophie [1 ]
Hennes, Jan-Lucca [1 ]
Bley, Thorsten Alexander [1 ]
Grunz, Jan-Peter [1 ,4 ]
Gruschwitz, Philipp [1 ]
机构
[1] Univ Hosp Wurzburg, Dept Diagnost & Intervent Radiol, Oberdurrbacher Str 6, D-97080 Wurzburg, Germany
[2] Univ Wurzburg, Inst Anat & Cell Biol, Wurzburg, Germany
[3] Univ Hosp Wurzburg, Dept Gen Visceral Transplant Vasc & Pediat Surg, Wurzburg, Germany
[4] Univ Wisconsin Madison, Dept Radiol, Madison, WI 53792 USA
来源
SCIENTIFIC REPORTS | 2024年 / 14卷 / 01期
关键词
ARTERIAL OCCLUSIVE DISEASE; COMPUTED-TOMOGRAPHY; PERFORMANCE; MANAGEMENT;
D O I
10.1038/s41598-024-79188-3
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Aim was to evaluate the influence of different quantum iterative reconstruction (QIR) levels on the image quality of femoral photon-counting CT angiographies (PCD-CTA). Ultra-high resolution PCD-CTA were obtained from both extremities of five extracorporeally-perfused cadavers using constant tube voltage and maximum radiation dose (71.2 +/- 11.0 mGy). Images were reconstructed with three kernels (Bv48, Bv60, Bv76) and the four available levels of QIR. Signal attenuation in the arterial lumen, muscle, and fat were measured. Contrast-to-noise ratios (CNR) and blurring scores were calculated for objective assessment. Six radiologists evaluated the subjective image quality using a pairwise comparison tool. Higher QIR level resulted in a decisive image noise reduction, especially with sharper convolution kernels (Bv60: Q1 11.5 +/- 6.3 HU vs. Q4 8.4 +/- 2.6 HU; p < 0.001). Largest improvement of CNR was recorded with ultra-sharp reconstructions (Bv76: Q1 20.2 +/- 4.4 vs. Q4 28.0 +/- 3.5; p < 0.001). Blurring decreased with higher QIR levels for soft Bv48, remained constant for medium Bv60, and increased for sharp Bv76 reconstructions. Subjective QIR level preference varied kernel depending, preferred combinations were: Bv48/Q4, Bv60/Q2, Bv76/Q3. Interrater agreement was excellent. Sharp kernels benefited most from noise reduction of higher QIR levels in lower extremity PCD-CTA. In sum, QIR level 3 provided the best objective and subjective image quality results.
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页数:9
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