In combination with the clinical history, circumstances of the death and external examination, the causes of natural death that can be diagnosed using cross-sectional imaging without angiography (a procedure that allows the blood vessels to be visualised and can show arterial disease that could have, for example, caused a heart attack) include: • haemorrhagic events such as ruptured aortic aneurysm • coronary artery disease in the presence of severe coronary artery calcification • disseminated malignancy, although it might not be possible to identify tumour deposits within a solid organ such as the liver using unenhanced imaging • pneumonia • certain intra-abdominal events such as intestinal obstruction and perforation, although identification of the cause of obstruction or site...