1
|
Okutsu M, Mitomo S, Onishi H, Nakajima A, Yabushita H, Matsuoka S, Kawamoto H, Watanabe Y, Tanaka K, Naganuma T, Tahara S, Nakamura S, Basavarajaiah S, Nakamura S. The estimation of coronary artery calcium thickness by computed tomography angiography based on optical coherence tomography measurements. Heart Vessels 2023; 38:1305-1317. [PMID: 37422802 DOI: 10.1007/s00380-023-02286-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 06/29/2023] [Indexed: 07/11/2023]
Abstract
Optical coherence tomography (OCT) is recommended to be the most appropriate modality in assessing calcium thickness, however, it has limitations associated with infrared attenuation. Although coronary computed tomography angiography (CCTA) detects calcification, it has low resolution and hence not recommended to measure the calcium size. The aim of this study was to devise a simple algorithm to estimate calcium thickness based on the CCTA image. A total of 68 patients who had CCTA for suspected coronary artery disease and subsequently went on to have OCT were included in the study. 238 lesions of them divided into derivation and validation dataset at 2:1 ratio (47 patients with 159 lesions and 21 with 79, respectively) were analyzed. A new method was developed to estimate calcium thickness from the maximum CT density within the calcification and compared with calcium thickness measured by OCT. Maximum Calcium density and measured calcium-border CT density had a good correlation with a linear equation of y = 0.58x + 201 (r = 0.892, 95% CI 0.855-0.919, p < 0.001). The estimated calcium thickness derived from this equation showed strong agreement with measured calcium thickness in validation and derivation dataset (r2 = 0.481 and 0.527, 95% CI 0.609-0.842 and 0.497-0.782, p < 0.001 in both, respectively), more accurate than the estimation by full width at half maximum and inflection point method. In conclusion, this novel method provided the estimation of calcium thickness more accurately than conventional methods.
Collapse
Affiliation(s)
- Masaaki Okutsu
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan.
| | - Satoru Mitomo
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Hirokazu Onishi
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Akihiro Nakajima
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Hiroto Yabushita
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Satoshi Matsuoka
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Hiroyoshi Kawamoto
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Yusuke Watanabe
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Kentaro Tanaka
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Toru Naganuma
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Satoko Tahara
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Shotaro Nakamura
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| | - Sandeep Basavarajaiah
- Department of Cardiology, Heartlands Hospital, University Hospitals Birmingham, Birmingham, UK
| | - Sunao Nakamura
- Department of Cardiovascular Medicine, New Tokyo Hospital, 1271, Wanagaya, Matsudo, Chiba, 270-2232, Japan
| |
Collapse
|
2
|
Okamura Y, Nakanishi R, Hashimoto H, Mizumura S, Homma S, Ikeda T. Relationship Between 18F-fluorodeoxyglucose Uptake on Positron Emission Tomography and Aortic Calcification. ANNALS OF NUCLEAR CARDIOLOGY 2022; 8:57-66. [PMID: 36540185 PMCID: PMC9749753 DOI: 10.17996/anc.22-00160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/12/2022] [Accepted: 07/26/2022] [Indexed: 06/17/2023]
Abstract
Introduction: Although 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET) has been widely utilized to assess the extent of inflammation, the association between the extent and severity of atherosclerosis and 18F-FDG uptake on PET remains unexamined. The current study aimed to investigate whether aortic calcium (AC) scores were associated with increased aortic uptake of 18F-FDG on PET. Methods: A total of 167 consecutive patients with suspected lung cancer but unproven malignancy who underwent non-contrast-enhanced computed tomography (CT) and 18F-FDG PET/CT were enrolled. The average standardized uptake values in the ascending aorta were used to calculate the target-to-background ratio (Mean TBR). The total (thoracic and abdominal) AC scores were measured on non-contrast-enhanced chest and abdominal CT using the Agatston method, and were categorized into three groups (0, 1-399, and ≥400). The relationship between total AC scores and 18F-FDG uptake in the ascending aorta was assessed using multivariate linear regression analysis. Results: In total, 68.26% were male, and a mean age was 67.10±14.70 years. Mean TBR values increased progressively with total AC score 0, 1-399, and ≥400 (1.01±0.07, 1.08±0.09, and 1.11±0.11, respectively; p<0.00001). Multivariate linear regression analysis revealed that increased total AC scores of 1-399 (β=0.06, 95% CI: 0.01-0.11, p=0.02) and ≥400 (β=0.11, 95% CI: 0.06-0.16, p<0.001) were significantly associated with higher Mean TBR. Conclusions: The current study demonstrated that total AC scores were associated with Mean TBR. Patients with a greater extent and severity of aortic calcifications may possess increased atherosclerotic inflammatory activity as measured by 18F-FDG PET/CT.
Collapse
Affiliation(s)
- Yuriko Okamura
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Rine Nakanishi
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Hidenobu Hashimoto
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Sunao Mizumura
- Department of Radiology, Toho University Faculty of Medicine, Tokyo, Japan
| | - Sakae Homma
- Department of Respiratory Medicine, School of Medicine, Faculty of Medicine, Toho University, Tokyo, Japan
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
| |
Collapse
|