Feasibility and optimization of aortic valve planimetry with MDCT

Suhny Abbara, Antonio J. Pena, Paul Maurovich-Horvat, Javed Butler, David E. Sosnovik, Alexander Lembcke, Ricardo C. Cury, Udo Hoffmann, Maros Ferencik, Thomas J. Brady

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

OBJECTIVE. The aortic valve can be assessed using MDCT; however, measurements of the aortic opening area vary with the cardiac cycle. In this study, we sought to assess the optimal timing for measuring the area of the aortic opening with MDCT. MATERIALS AND METHODS. Retrospectively gated MDCT was performed in 57 patients with the following parameters: gantry rotation time, 420 milliseconds; tube voltage, 120 kV; tube current, 550 mAs with tube current modulation; and slice collimation, 16 × 0.75 mm. From 72 to 100 mL of contrast agent (320 g/mL3) was injected IV at 4-5 mL/s. High-resolution data sets were obtained for planimetry at phase starts of 0, 50, 100, 150, and 200 milliseconds after the R wave peak and were assessed for aortic opening area and the presence of artifacts. RESULTS. In 41% of patients, the cardiac phase with the largest aortic opening area was at 50 milliseconds after the R wave peak. The area of the aortic opening measured at 0 milliseconds after the R peak was 2.7 ± 0.8 cm2 (mean ± SD); at 50 milliseconds, 2.9 ± 0.2 cm2; at 100 milliseconds, 2.9 ± 0.7 cm2; at 150 milliseconds, 2.8 ± 0.7 cm2; and at 200 milliseconds, 2.4 ± 0.8 cm2. The image quality was best at 50 milliseconds after the R peak in 42% of patients, 100 milliseconds in 29%, 150 milliseconds in 20%, 0 milliseconds in 7%, and 200 milliseconds in 2%. The aortic valve appeared closed in three patients at 0 milliseconds and in four patients at 200 milliseconds. Fewer artifacts were present in the midsystolic phases (i.e., 50-150 milliseconds) ("double-leaflet" artifact, 5-13%; "incomplete contour" artifact, 20-26%) than in the early (0 milliseconds) and late (200 milliseconds) systolic phases (double-leaflet artifact, 38% and 43% of patients; incomplete contour artifact, 76% and 73%, respectively). CONCLUSION. Aortic valve planimetry is best performed at phase starts of 50-100 milliseconds after the R peak because the area of the aortic opening is widest and image quality is best at that phase.

Original languageEnglish (US)
Pages (from-to)356-360
Number of pages5
JournalAmerican Journal of Roentgenology
Volume188
Issue number2
DOIs
StatePublished - Feb 2007
Externally publishedYes

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Aortic Valve
Artifacts
Contrast Media

Keywords

  • Aorta
  • Aortic valve
  • Cardiac imaging
  • Coronary artery disease
  • Heart disease
  • MDCT
  • Planimetry

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Abbara, S., Pena, A. J., Maurovich-Horvat, P., Butler, J., Sosnovik, D. E., Lembcke, A., ... Brady, T. J. (2007). Feasibility and optimization of aortic valve planimetry with MDCT. American Journal of Roentgenology, 188(2), 356-360. https://doi.org/10.2214/AJR.06.0232

Feasibility and optimization of aortic valve planimetry with MDCT. / Abbara, Suhny; Pena, Antonio J.; Maurovich-Horvat, Paul; Butler, Javed; Sosnovik, David E.; Lembcke, Alexander; Cury, Ricardo C.; Hoffmann, Udo; Ferencik, Maros; Brady, Thomas J.

In: American Journal of Roentgenology, Vol. 188, No. 2, 02.2007, p. 356-360.

Research output: Contribution to journalArticle

Abbara, S, Pena, AJ, Maurovich-Horvat, P, Butler, J, Sosnovik, DE, Lembcke, A, Cury, RC, Hoffmann, U, Ferencik, M & Brady, TJ 2007, 'Feasibility and optimization of aortic valve planimetry with MDCT', American Journal of Roentgenology, vol. 188, no. 2, pp. 356-360. https://doi.org/10.2214/AJR.06.0232
Abbara S, Pena AJ, Maurovich-Horvat P, Butler J, Sosnovik DE, Lembcke A et al. Feasibility and optimization of aortic valve planimetry with MDCT. American Journal of Roentgenology. 2007 Feb;188(2):356-360. https://doi.org/10.2214/AJR.06.0232
Abbara, Suhny ; Pena, Antonio J. ; Maurovich-Horvat, Paul ; Butler, Javed ; Sosnovik, David E. ; Lembcke, Alexander ; Cury, Ricardo C. ; Hoffmann, Udo ; Ferencik, Maros ; Brady, Thomas J. / Feasibility and optimization of aortic valve planimetry with MDCT. In: American Journal of Roentgenology. 2007 ; Vol. 188, No. 2. pp. 356-360.
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abstract = "OBJECTIVE. The aortic valve can be assessed using MDCT; however, measurements of the aortic opening area vary with the cardiac cycle. In this study, we sought to assess the optimal timing for measuring the area of the aortic opening with MDCT. MATERIALS AND METHODS. Retrospectively gated MDCT was performed in 57 patients with the following parameters: gantry rotation time, 420 milliseconds; tube voltage, 120 kV; tube current, 550 mAs with tube current modulation; and slice collimation, 16 × 0.75 mm. From 72 to 100 mL of contrast agent (320 g/mL3) was injected IV at 4-5 mL/s. High-resolution data sets were obtained for planimetry at phase starts of 0, 50, 100, 150, and 200 milliseconds after the R wave peak and were assessed for aortic opening area and the presence of artifacts. RESULTS. In 41{\%} of patients, the cardiac phase with the largest aortic opening area was at 50 milliseconds after the R wave peak. The area of the aortic opening measured at 0 milliseconds after the R peak was 2.7 ± 0.8 cm2 (mean ± SD); at 50 milliseconds, 2.9 ± 0.2 cm2; at 100 milliseconds, 2.9 ± 0.7 cm2; at 150 milliseconds, 2.8 ± 0.7 cm2; and at 200 milliseconds, 2.4 ± 0.8 cm2. The image quality was best at 50 milliseconds after the R peak in 42{\%} of patients, 100 milliseconds in 29{\%}, 150 milliseconds in 20{\%}, 0 milliseconds in 7{\%}, and 200 milliseconds in 2{\%}. The aortic valve appeared closed in three patients at 0 milliseconds and in four patients at 200 milliseconds. Fewer artifacts were present in the midsystolic phases (i.e., 50-150 milliseconds) ({"}double-leaflet{"} artifact, 5-13{\%}; {"}incomplete contour{"} artifact, 20-26{\%}) than in the early (0 milliseconds) and late (200 milliseconds) systolic phases (double-leaflet artifact, 38{\%} and 43{\%} of patients; incomplete contour artifact, 76{\%} and 73{\%}, respectively). CONCLUSION. Aortic valve planimetry is best performed at phase starts of 50-100 milliseconds after the R peak because the area of the aortic opening is widest and image quality is best at that phase.",
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AU - Abbara, Suhny

AU - Pena, Antonio J.

AU - Maurovich-Horvat, Paul

AU - Butler, Javed

AU - Sosnovik, David E.

AU - Lembcke, Alexander

AU - Cury, Ricardo C.

AU - Hoffmann, Udo

AU - Ferencik, Maros

AU - Brady, Thomas J.

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Y1 - 2007/2

N2 - OBJECTIVE. The aortic valve can be assessed using MDCT; however, measurements of the aortic opening area vary with the cardiac cycle. In this study, we sought to assess the optimal timing for measuring the area of the aortic opening with MDCT. MATERIALS AND METHODS. Retrospectively gated MDCT was performed in 57 patients with the following parameters: gantry rotation time, 420 milliseconds; tube voltage, 120 kV; tube current, 550 mAs with tube current modulation; and slice collimation, 16 × 0.75 mm. From 72 to 100 mL of contrast agent (320 g/mL3) was injected IV at 4-5 mL/s. High-resolution data sets were obtained for planimetry at phase starts of 0, 50, 100, 150, and 200 milliseconds after the R wave peak and were assessed for aortic opening area and the presence of artifacts. RESULTS. In 41% of patients, the cardiac phase with the largest aortic opening area was at 50 milliseconds after the R wave peak. The area of the aortic opening measured at 0 milliseconds after the R peak was 2.7 ± 0.8 cm2 (mean ± SD); at 50 milliseconds, 2.9 ± 0.2 cm2; at 100 milliseconds, 2.9 ± 0.7 cm2; at 150 milliseconds, 2.8 ± 0.7 cm2; and at 200 milliseconds, 2.4 ± 0.8 cm2. The image quality was best at 50 milliseconds after the R peak in 42% of patients, 100 milliseconds in 29%, 150 milliseconds in 20%, 0 milliseconds in 7%, and 200 milliseconds in 2%. The aortic valve appeared closed in three patients at 0 milliseconds and in four patients at 200 milliseconds. Fewer artifacts were present in the midsystolic phases (i.e., 50-150 milliseconds) ("double-leaflet" artifact, 5-13%; "incomplete contour" artifact, 20-26%) than in the early (0 milliseconds) and late (200 milliseconds) systolic phases (double-leaflet artifact, 38% and 43% of patients; incomplete contour artifact, 76% and 73%, respectively). CONCLUSION. Aortic valve planimetry is best performed at phase starts of 50-100 milliseconds after the R peak because the area of the aortic opening is widest and image quality is best at that phase.

AB - OBJECTIVE. The aortic valve can be assessed using MDCT; however, measurements of the aortic opening area vary with the cardiac cycle. In this study, we sought to assess the optimal timing for measuring the area of the aortic opening with MDCT. MATERIALS AND METHODS. Retrospectively gated MDCT was performed in 57 patients with the following parameters: gantry rotation time, 420 milliseconds; tube voltage, 120 kV; tube current, 550 mAs with tube current modulation; and slice collimation, 16 × 0.75 mm. From 72 to 100 mL of contrast agent (320 g/mL3) was injected IV at 4-5 mL/s. High-resolution data sets were obtained for planimetry at phase starts of 0, 50, 100, 150, and 200 milliseconds after the R wave peak and were assessed for aortic opening area and the presence of artifacts. RESULTS. In 41% of patients, the cardiac phase with the largest aortic opening area was at 50 milliseconds after the R wave peak. The area of the aortic opening measured at 0 milliseconds after the R peak was 2.7 ± 0.8 cm2 (mean ± SD); at 50 milliseconds, 2.9 ± 0.2 cm2; at 100 milliseconds, 2.9 ± 0.7 cm2; at 150 milliseconds, 2.8 ± 0.7 cm2; and at 200 milliseconds, 2.4 ± 0.8 cm2. The image quality was best at 50 milliseconds after the R peak in 42% of patients, 100 milliseconds in 29%, 150 milliseconds in 20%, 0 milliseconds in 7%, and 200 milliseconds in 2%. The aortic valve appeared closed in three patients at 0 milliseconds and in four patients at 200 milliseconds. Fewer artifacts were present in the midsystolic phases (i.e., 50-150 milliseconds) ("double-leaflet" artifact, 5-13%; "incomplete contour" artifact, 20-26%) than in the early (0 milliseconds) and late (200 milliseconds) systolic phases (double-leaflet artifact, 38% and 43% of patients; incomplete contour artifact, 76% and 73%, respectively). CONCLUSION. Aortic valve planimetry is best performed at phase starts of 50-100 milliseconds after the R peak because the area of the aortic opening is widest and image quality is best at that phase.

KW - Aorta

KW - Aortic valve

KW - Cardiac imaging

KW - Coronary artery disease

KW - Heart disease

KW - MDCT

KW - Planimetry

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