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For the diagnosis of neuroendocrine tumors, Gallium-68 DOTATATE PET is used

The most sensitive investigation for acute infarct (ischemic stroke) is diffusion-weighted MRI (DWI/DW-MRI), especially when a CT scan might appear normal

Retrograde urethrogram (RGU) is the investigation of choice for urethral strictures and urethral trauma. It specifically visualizes the anterior urethra (bulbar and penile urethra)

• In cases of aortic dissection, the investigation of choice for a stable patient is CT angiography, while for an unstable patient, transesophageal echocardiography (TEE) is preferred

• For diagnosing renal tuberculosis (TB), the investigation of choice is a contrast CT procedure known as CT urography.

Micturating cystourethrography (MCU) is the investigation of choice for both vesicoureteral reflux and posterior urethral wall issues

For evaluating the integrity of cardiac pacemakers or implantable cardioverter-defibrillator (ICD) devices, the chest radiograph is the preferred investigation

TB Meningitis: Characterized by a triad of basal exudates, hydrocephalus, and infarcts

Multiple Sclerosis (MS): On FLAIR MRI, it shows periventricular white matter hyperintensities perpendicular to the ventricle, known as "Dawson fingers". It also shows "horseshoe" or "open ring" enhancemen

Golden Point-Subarachnoid Hemorrhage (SAH): Characterized by hyperdense sulci and blood collection in the Sylvian fissure, interhemispheric area, and basal cisterns, often described as a "star of death" appearance. The most common cause of spontaneous SAH is the rupture of berry aneurysms, often presenting with a "thunderclap headache". Non-contrast CT is the investigation of choice for acute SAH

Hallervorden-Spatz Disease (PANK): Eye of Tiger appearance (iron deposition in globus pallidus)

Neurogenic Bladder: Christmas Tree/Pine Tree appearance. Posterior Urethral Valve (PUV): Keyhole appearance on antenatal scan (exclusively male child)

Tension Pneumocephalus: Mount Fuji sign

Ga-68 DOTATATE PET for diagnosis and Lu-177 DOTATATE for treatment of neuroendocrine tumors