**Core Concept**
Cerebral angiography is a medical imaging technique used to visualize the blood vessels of the brain. It involves injecting a contrast agent into the blood vessels to highlight their structure and identify any abnormalities. The development of cerebral angiography marked an important milestone in the field of neuroimaging.

**Why the Correct Answer is Right**
Egas Moniz, a Portuguese neurologist, is credited with the development of cerebral angiography. He introduced the technique in 1927 using a procedure known as the "Moniz technique," which involved injecting a contrast agent into the carotid artery to visualize the cerebral blood vessels. This innovation revolutionized the diagnosis and treatment of cerebral vascular diseases. The Moniz technique paved the way for modern cerebral angiography, which is now a crucial tool in neurology and neurosurgery.

**Why Each Wrong Option is Incorrect**
**Option A:** Sir Walter Dandy made significant contributions to neurosurgery, particularly in the field of cerebrospinal fluid dynamics. However, he is not associated with the development of cerebral angiography.
**Option B:** George Moore was an Australian neurologist who made important contributions to the field of neurology, but he is not credited with the development of cerebral angiography.
**Option C:** Seldinger is credited with developing the Seldinger technique, a method for introducing catheters into blood vessels using a guidewire. While this technique is related to angiography, it is not the same as cerebral angiography, and Seldinger is not credited with its development.

**Clinical Pearl / High-Yield Fact**
Egas Moniz's work on cerebral angiography led to a deeper understanding of cerebral vascular diseases, including stroke and cerebral hemorrhage. This knowledge has had a lasting impact on the diagnosis and treatment of these conditions, and his contributions to the field of neurology remain significant to this day.

**✓ Correct Answer: D. Egas Moniz**