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Detection of late radiation damage on left atrial fibrosis using cardiac late gadolinium enhancement magnetic resonance imaging  Y. Jessica Huang, PhD,

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Presentation on theme: "Detection of late radiation damage on left atrial fibrosis using cardiac late gadolinium enhancement magnetic resonance imaging  Y. Jessica Huang, PhD,"— Presentation transcript:

1 Detection of late radiation damage on left atrial fibrosis using cardiac late gadolinium enhancement magnetic resonance imaging  Y. Jessica Huang, PhD, Alexis Harrison, MD, Vikren Sarkar, PhD, Prema Rassiah-Szegedi, PhD, Hui Zhao, PhD, Martin Szegedi, PhD, Long Huang, PhD, Brent Wilson, MD, PhD, David K. Gaffney, MD, PhD, Bill J. Salter, PhD  Advances in Radiation Oncology  Volume 1, Issue 2, Pages (April 2016) DOI: /j.adro Copyright © 2016 The Authors on behalf of the American Society for Radiation Oncology Terms and Conditions

2 Figure 1 (A) Late gadolinium enhancement magnetic resonance imaging (LGE-MRI) with masked structures. Red arrow, left atrium (LA) scar (white structure); green arrow, LA wall (light gray structure); blue arrow, LA blood pool (darker gray). (B) Computed tomography scan taken at the time of simulation for treatment planning showing the same region of interests as the LGE MRI. (C) Rigid computed tomography/MRI registration results with split window view. Red arrow, LA scar; blue arrow, LA blood pool. Advances in Radiation Oncology 2016 1, DOI: ( /j.adro ) Copyright © 2016 The Authors on behalf of the American Society for Radiation Oncology Terms and Conditions

3 Figure 2 Treatment plan showing isodose distribution for treatment of the esophagus using 3-dimensional conformal four field technique overlaid on blended computed tomography/magnetic resonance imaging. Red arrow, left atrium scar; blue arrow, left atrium blood pool; green arrow, left atrium wall. Advances in Radiation Oncology 2016 1, DOI: ( /j.adro ) Copyright © 2016 The Authors on behalf of the American Society for Radiation Oncology Terms and Conditions

4 Figure 3 Left atrium (LA) wall and LA scar 3-dimensional display in different dose levels to demonstrate higher dose level resulted in higher percentage of LA scar/LA wall ratio for 1 of the cases. The heart is shown in dark gray line; LA wall in light green; LA scar in magenta. (A) The amount of LA wall and LA scar that were irradiated with 10 Gy; LA scar/LA wall: 17.3%. (B) The amount of LA wall and LA scar that were irradiated with 30 Gy; LA scar/LA wall: 22.0%. Advances in Radiation Oncology 2016 1, DOI: ( /j.adro ) Copyright © 2016 The Authors on behalf of the American Society for Radiation Oncology Terms and Conditions

5 Figure 4 Scatter plot of (A) Dmean versus left atrium (LA) scar volume. (B) Dmean versus right atrium (RA) scar volume. Advances in Radiation Oncology 2016 1, DOI: ( /j.adro ) Copyright © 2016 The Authors on behalf of the American Society for Radiation Oncology Terms and Conditions

6 Figure 5 Scatter plot of equivalent dose delivered in 2-Gy per fraction (EQD2)-mean dose (Dmean) versus left atrium (LA) scar volume. Advances in Radiation Oncology 2016 1, DOI: ( /j.adro ) Copyright © 2016 The Authors on behalf of the American Society for Radiation Oncology Terms and Conditions

7 Figure 6 Relationship between dose level and the percentage of cardiac tissue change (left atrium [LA] scar/LA wall). The data shown were in 5 dose level groups: ≤5 Gy, 5-10 Gy, Gy, Gy, and ≥20 Gy. The resulting average cardiac tissue changes were 12.06% (95 confidence interval [CI], %), 19.48% (95 CI, %), no data available for dose level of Gy, 26.33% (95 CI, %), and 32.56% (95 CI, %), respectively. Advances in Radiation Oncology 2016 1, DOI: ( /j.adro ) Copyright © 2016 The Authors on behalf of the American Society for Radiation Oncology Terms and Conditions

8 Figure 7 Scatter plot of normal tissue complication probability (NTCP) result versus left atrium (LA) scar volume. Advances in Radiation Oncology 2016 1, DOI: ( /j.adro ) Copyright © 2016 The Authors on behalf of the American Society for Radiation Oncology Terms and Conditions

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