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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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