Vascular enhancement and image quality of MDCT pulmonary angiography in 400 cases : comparison of standard and low kilovoltage settings
OBJECTIVE: The purpose of this study was to investigate the vascular enhancement and image quality of pulmonary CT angiography performed with lower peak kilovoltage settings in a large patient sample.
MATERIALS AND METHODS: This retrospective study was approved by our institutional review board, which waived the requirement for informed consent. Four hundred patients believed to have a pulmonary embolism were studied. All patients underwent 16- or 64-MDCT with automatic tube current modulation. The 200 patients in the standard peak kilovoltage group (mean age, 57 years; range, 22-95 years) underwent MDCT at 130 or 120 kVp. The 200 patients in the low peak kilovoltage group (mean age, 56 years; range, 21-92 years) underwent MDCT at 110 or 100 kVp. Vascular enhancement was evaluated by measurement of the attenuation value in the main pulmonary artery and segmental and subsegmental arteries. Image noise was quantified by measurement of the SD of the attenuation value in the main pulmonary artery. One blinded radiologist assessed image quality using visual scores. Wilcoxon's rank test was used to evaluate differences between the groups.
RESULTS: Mean vascular enhancement in the main pulmonary artery had significantly higher attenuation values in the low peak kilovoltage group (376.1 +/- 102.9 HU) than in the standard peak kilovoltage group (309.2 +/- 94.8 HU) (p < 0.0001). Mean attenuation values in all measured segmental and subsegmental arteries were significantly higher in the low peak kilovoltage group than in the standard peak kilovoltage group (p < 0.0001). Image noise in the low peak kilovoltage group was significantly higher than in the standard peak kilovoltage group (p < 0.0001). There was no significant difference in the image quality scores of the two groups (p = 0.116).
CONCLUSION: Lowering kilovoltage improved vascular enhancement without deterioration of image quality. The results of our study confirm previously reported preliminary findings.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2009 |
|---|---|
| Erschienen: |
2009 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:192 |
|---|---|
| Enthalten in: |
AJR. American journal of roentgenology - 192(2009), 6 vom: 15. Juni, Seite 1651-6 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Matsuoka, Shin [VerfasserIn] |
|---|
| Links: |
|---|
| Themen: |
Comparative Study |
|---|
| Anmerkungen: |
Date Completed 16.06.2009 Date Revised 18.03.2022 published: Print Citation Status MEDLINE |
|---|
| doi: |
10.2214/AJR.08.1730 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM188671684 |
|---|
| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM188671684 | ||
| 003 | DE-627 | ||
| 005 | 20231223182330.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231223s2009 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.2214/AJR.08.1730 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n0629.xml |
| 035 | |a (DE-627)NLM188671684 | ||
| 035 | |a (NLM)19457830 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Matsuoka, Shin |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Vascular enhancement and image quality of MDCT pulmonary angiography in 400 cases |b comparison of standard and low kilovoltage settings |
| 264 | 1 | |c 2009 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Completed 16.06.2009 | ||
| 500 | |a Date Revised 18.03.2022 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a OBJECTIVE: The purpose of this study was to investigate the vascular enhancement and image quality of pulmonary CT angiography performed with lower peak kilovoltage settings in a large patient sample | ||
| 520 | |a MATERIALS AND METHODS: This retrospective study was approved by our institutional review board, which waived the requirement for informed consent. Four hundred patients believed to have a pulmonary embolism were studied. All patients underwent 16- or 64-MDCT with automatic tube current modulation. The 200 patients in the standard peak kilovoltage group (mean age, 57 years; range, 22-95 years) underwent MDCT at 130 or 120 kVp. The 200 patients in the low peak kilovoltage group (mean age, 56 years; range, 21-92 years) underwent MDCT at 110 or 100 kVp. Vascular enhancement was evaluated by measurement of the attenuation value in the main pulmonary artery and segmental and subsegmental arteries. Image noise was quantified by measurement of the SD of the attenuation value in the main pulmonary artery. One blinded radiologist assessed image quality using visual scores. Wilcoxon's rank test was used to evaluate differences between the groups | ||
| 520 | |a RESULTS: Mean vascular enhancement in the main pulmonary artery had significantly higher attenuation values in the low peak kilovoltage group (376.1 +/- 102.9 HU) than in the standard peak kilovoltage group (309.2 +/- 94.8 HU) (p < 0.0001). Mean attenuation values in all measured segmental and subsegmental arteries were significantly higher in the low peak kilovoltage group than in the standard peak kilovoltage group (p < 0.0001). Image noise in the low peak kilovoltage group was significantly higher than in the standard peak kilovoltage group (p < 0.0001). There was no significant difference in the image quality scores of the two groups (p = 0.116) | ||
| 520 | |a CONCLUSION: Lowering kilovoltage improved vascular enhancement without deterioration of image quality. The results of our study confirm previously reported preliminary findings | ||
| 650 | 4 | |a Comparative Study | |
| 650 | 4 | |a Evaluation Study | |
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 700 | 1 | |a Hunsaker, Andetta R |e verfasserin |4 aut | |
| 700 | 1 | |a Gill, Ritu R |e verfasserin |4 aut | |
| 700 | 1 | |a Oliva, Isabel B |e verfasserin |4 aut | |
| 700 | 1 | |a Trotman-Dickenson, Beatrice |e verfasserin |4 aut | |
| 700 | 1 | |a Jacobson, Francine L |e verfasserin |4 aut | |
| 700 | 1 | |a Hatabu, Hiroto |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t AJR. American journal of roentgenology |d 1981 |g 192(2009), 6 vom: 15. Juni, Seite 1651-6 |w (DE-627)NLM000037109 |x 1546-3141 |7 nnns |
| 773 | 1 | 8 | |g volume:192 |g year:2009 |g number:6 |g day:15 |g month:06 |g pages:1651-6 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.2214/AJR.08.1730 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 192 |j 2009 |e 6 |b 15 |c 06 |h 1651-6 | ||