Radioactive decay generally involves the emission of a charged particle or the capture of an electron by the nucleus to form stable nuclid...

Electromagnetic (EM) radiation arises from oscillating electric and magnetic fields. It can be considered either as a stream of quanta ...

The Rutherford-Bohr model of an atom Atoms consist of: Nucleus : contains positive protons (p) and neutra...

This patient had known left parotid adenoid cystic carcinoma. The axial T1-weighted fat-saturated gadolinium-enhanced MR image shows enlar...

This axial T2-weighted MR image shows a high signal lesion in the petrous apex region, also involving the clivus. The lesion is expansile ...

Brain MRI was requested for this 45 YO patient with diplopia to rule out multiple sclerosis. Axial & coronal images show focal dehisce...

This 32 year-old male presented with neck pain, vertigo and vomiting. The axial diffusion-weighted image (inset) shows restricted diffus...

80 year-old female with intermittent swelling at the right inner canthus for two years. Axial CT images show well-defined cystic lesion wi...

This patient had severe COPD and presented with spontaneous pneumothorax and respiratory distress. CXR and CT showed severe pulmonary emph...

48yo female, sent for ultrasound +/- FNA for ?cervical lymphadenopathy. Ultrasound showed multiple enlarged hypervascular lymph nodes, and...