63 year old patient with history of tachy-arrythmias is on implantable cardioveer defibrillator. The patient develops shock suddenly. Which of the following is best investigation to know position and integrity of ICD?

Radiology

63 year old patient with history of tachy-arrythmias is on implantable cardioveer defibrillator. The patient develops shock suddenly. Which of the following is best investigation to know position and integrity of ICD?

All of the following form radiolucent stones except:

The usual radiographic appearance of an osteosarcoma is:

A middle aged female presents with slowly progressive weakness of lower limbs,…