Dual-Energy Lung Perfusion in Portal Venous Phase CT—A Comparison with the Pulmonary Arterial Phase
Abstract
:1. Introduction
2. Materials and Methods
2.1. Patients
2.2. Dual Energy CT
2.3. Image Reconstruction
2.4. Objective Image Evaluation
2.5. Subjective Image Evaluation
2.6. Artifacts
2.7. Pathologic Findings
2.8. Statistics
3. Results
3.1. Patients
3.2. Objective Image Quality
3.3. Subjective Image Quality
3.4. Artifacts
3.5. Pathologic Findings
4. Discussion
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Conflicts of Interest
References
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Scan Parameters | vDE Study Group (n = 95) | aDE Reference Group (n = 94) | ||
---|---|---|---|---|
Tube | A | B | A | B |
Tube voltage | 70 kV | Sn 150 kV | 80 kV | Sn 150 kV |
Ref. mAs | 560 mAs | 140 mAs | 100 mAs | 77 mAs |
Rotation Time | 0.5 s | 0.25 s | ||
Delay | 70 s | Bolus tracking + 8 s | ||
CTDI | 8.23 ± 2.0 mGy | 5.4 ± 2.4 mGy | ||
DLP | 588 ± 151 mGy*cm | 208 ± 95 mGy*cm | ||
Pitch | 0.6 | 0.6 | ||
Collimation | 128 × 0.6 mm | 192 × 0.6 mm |
vDE (n = 95) | aDE (n = 94) | p-Value | aDEex (n = 62) | p-Value | |
---|---|---|---|---|---|
VT in [ml] | 4795 ± 1195 | 3885 ± 1307 | <0.01 | 3760 ± 1267 | <0.01 |
AT in [HU] | 23 ± 6 | 23 ± 7 | 0.87 | 23 ± 7 | 0.84 |
AA in [HU] | 224 ± 39 | 252 ± 78 | <0.01 | 247 ± 79 | 0.03 |
AP in [HU] | 224 ± 39 | 304 ± 107 | <0.01 | 301 ± 102 | <0.01 |
DL in % | 10 ± 2 | 8 ± 2 | <0.01 | 9 ± 2 | <0.01 |
Artifact Group | vDE n = 95 | aDE n = 94 | p-Value | ||
---|---|---|---|---|---|
and subgroup | total cases (n) | relative cases (%) | total cases (n) | relative cases (%) | vDE vs aDE |
Streak artifacts | 117 | 123 | 109 | 116 | 0.560 |
Spine | 82 | 86 | 35 | 37 | <0.001 |
Contrast agent filled vessels | 27 | 28 | 70 | 75 | <0.001 |
Metal | 8 | 8 | 4 | 4 | 0.243 |
Rotation artifacts | 121 | 127 | 125 | 133 | 0.568 |
Heart | 87 | 92 | 80 | 85 | 0.167 |
Diaphragm | 34 | 35 | 45 | 48 | 0.093 |
Dual Source artifacts | 5 | 5 | 7 | 7 | 0.541 |
Recess artifacts | 62 | 65 | 23 | 24 | <0.001 |
Anterior (costomediastinal) | 45 | 47 | 21 | 22 | <0.001 |
Posterior (azygoesophageal) | 17 | 18 | 2 | 2 | <0.001 |
Subpleural artifacts | 26 | 27 | 7 | 7 | <0.001 |
Pathological Finding | vDE (n = 95) | aDE (n = 94) | p-Value | ||
---|---|---|---|---|---|
Type | Total | % | Total | % | vDE vs aDE |
With anatomical correlate | 11 | 12 | 39 | 41 | 0.001 |
Decreased vascularization | 1 | 1 | 25 | 27 | 0.002 |
Increased vascularization | 0 | 0 | 3 | 3 | 0.757 |
Decreased parenchyma density | 4 | 4 | 3 | 3 | 0.609 |
Increased parenchyma density | 4 | 4 | 6 | 6 | 0.306 |
Architectural distortion | 2 | 2 | 2 | 2 | 0.999 |
Without anatomical correlate | 7 | 7 | 12 | 13 | 0.049 |
Lobar | 7 | 7 | 7 | 7 | 0.999 |
Anteroposterior gravity gradient | 0 | 0 | 5 | 5 | 0.606 |
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Praël, I.; Wuest, W.; Heiss, R.; Wiesmueller, M.; Kopp, M.; Uder, M.; May, M.S. Dual-Energy Lung Perfusion in Portal Venous Phase CT—A Comparison with the Pulmonary Arterial Phase. Diagnostics 2021, 11, 1989. https://doi.org/10.3390/diagnostics11111989
Praël I, Wuest W, Heiss R, Wiesmueller M, Kopp M, Uder M, May MS. Dual-Energy Lung Perfusion in Portal Venous Phase CT—A Comparison with the Pulmonary Arterial Phase. Diagnostics. 2021; 11(11):1989. https://doi.org/10.3390/diagnostics11111989
Chicago/Turabian StylePraël, Isabelle, Wolfgang Wuest, Rafael Heiss, Marco Wiesmueller, Markus Kopp, Michael Uder, and Matthias S. May. 2021. "Dual-Energy Lung Perfusion in Portal Venous Phase CT—A Comparison with the Pulmonary Arterial Phase" Diagnostics 11, no. 11: 1989. https://doi.org/10.3390/diagnostics11111989