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. Author manuscript; available in PMC: 2023 Feb 28.
Published in final edited form as: J Med Artif Intell. 2022 Dec;5:11. doi: 10.21037/jmai-22-36

Figure 2. A stacked bar plot showing the number of studies for each imaging modality in the last 6 years.

Figure 2

Some imaging modalities are very rare and not widely used, therefore they are not explained in the text but listed in the table and the bar plot, such as cPSTA and coronary angioscopy. Invasive coronary angioscopy is an old technique used for direct lumen visualisation using lenses and a light bulb, similar to endoscopic principles. One study of retinal fundus imaging was included as it used deep learning to predict coronary calcification compared to CCTA (78). CCTA, coronary computed tomographic angiography; cPSTA, cardiac phase space tomography analysis; IVUS, intra-vascular ultrasound; OCT, optic coherence tomography.