Hong Kong Journal of Radiology (HKJR) is the official peer-reviewed academic journal of the Hong Kong College of Radiologists. HKJR is published online quarterly by Hong Kong Academy of Medicine Press. HKJR is a continuation of the Journal of the Hong Kong College of Radiologists. HKJR publishes papers on all aspects of diagnostic imaging, clinical oncology, and nuclear medicine, including original research articles, review articles, perspectives, pictorial essays, case reports, brief communications, editorials, and letters to the Editor. Papers on radiological protection, quality assurance, audit in radiology, and matters related to radiological training or education are also included.