LET US LOOK AT ASTRONOMY THROUGH THE EYES OF A RADIOLOGIST
Abstract
Objective: The objective of this article is to present astronomical inspired signs seen in radiology, which will eventually help in imaging based diagnosis.
Study Design: Retrospective study
Place and Duration of Study: Radiology Department, Shifa International Hospital, from 2020 to 2023.
Methodology: We compiled all the cases with interesting astronomical signs manifested on various radiological modalities including radiograph, ultrasound and CT.
- Comet tail artifact seen on grey scale ultrasound is noted in gallbladder adenomyomatosis and thyroid colloid cyst.
- Comet tail artifact seen on color doppler ultrasound is noted in renal/ureteric calculus.
- Comet tail sign seen on CT chest is noted in round atelectasis.
- Galaxy sign seen on CT chest is noted in sarcoidosis or pulmonary TB.
- Loss of half-moon sign seen on shoulder radiograph is noted in posterior shoulder dislocation.
- Starry sky appearance seen on grey scale ultrasound is noted in acute hepatitis.
- Starry sky appearance seen on MR is noted in multiple biliary hamartomas.
- Sunburst appearance seen on radiograph is noted in osteosarcoma.
- Sunburst sign seen on MR brain is noted in meningioma.
- Sunburst sign seen on DSA is noted in renal angiomyolipoma.
- Sunset eye sign seen on CT brain in obstructive hydrocephalus.
- Twinkling artifact seen on color Doppler ultrasound is noted in calculi.
- Earth heart sign seen on radiograph chest is noted in tension pneumomediastinum.
- Milky sign seen on MR brain is noted in multifocal leukoencephalopathy.
- Star-field pattern seen on MR brain is noted in fat embolism.
Result: Imaging features in various modalities of aforementioned diseases are explained narrowing down the differentials.
Conclusion: Understanding of these clearly discernible astronomy-based signs is crucial since it aids in cutting down the lengthy range of differentials and also aids in imaging-based diagnosis.
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