This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CT SCAN, Subject name: Radiology
[{'content': 'Which is true about Lipoma on USG, MRI & CT \nSelect and explain. \nA. it is hypoechoic,hypointense,hypodense, B. it is hyperechoic,hyperintense,hyperdense, C. it is hypoechoic,hypointense hyperdense, D. it is hyperechoic,hyperintense,hypodense', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Fat is hyperechoic (white) on Ultrasound. Fat is hyperintense(white) on both T1 & T2 W MRI in modern MRI sequences. Fat is hypodense (black) on CT with Hu of around -100 HU. On CT, lipomas are well-demarcated homogeneous masses of hypodensity (-90 to -150 HU). USG of lipoma of thigh CT axial view showing lipoma in right lateral aspect of neck. MRI T1 W image axial view showing lipoma in left cheek.', 'role': 'assistant'}]