RAHBAR
RAHBAR MBBSBasics of Radiology • Third Year Deep Learning Master
 ← Year 03 Subjects
YEAR 03 • BASICS OF RADIOLOGY • 20-MODULE • FULL CHAPTER MASTER

Basics of Radiology Learning Material

20 learning units covering imaging selection, modality fundamentals, patient safety and systematic interpretation across major body systems. Read the chapters, revise the key distinctions, then attempt 10 explained questions per unit in practice or assessment mode.

Academic scope: Original RAHBAR notes for the Year 3 clinical transition, covering foundational diagnostic imaging within the RAHBAR MBBS pathway. Institutional sequencing may differ. Examples are educational; clinical decisions and procedures require appropriate supervision and current local protocols. Sources & further reading ↓
RA
● MODULE 14 / 20

Brain, Stroke & Spinal Imaging

Recognize why timing and sequence matter in neurological emergencies and structural disease.

Quick revision ↓ Medical Dictionary

FULL CHAPTER EXPLANATION

Deep Learning — Module 14

Connect the clinical question to modality choice, image appearances, limitations and the next decision.

01

Initial brain assessment

Noncontrast head CT is rapid and useful for many acute hemorrhage and trauma questions. Review symmetry, ventricles, cisterns, extra-axial spaces, brain tissue and bone using appropriate displays. Acute blood is often hyperattenuating, but appearance changes with time and patient factors. A single bright focus can also be calcification or artifact, so location, morphology and the full examination are essential.

02

Stroke is time-sensitive

Sudden focal neurological symptoms require an urgent stroke pathway rather than waiting for routine imaging. Early ischemic change may be subtle or absent on CT, so a normal initial image does not exclude ischemic stroke. Vascular or perfusion imaging may guide selected treatment decisions. MRI diffusion can detect many acute infarcts, but no modality should be interpreted without symptom timing, neurological assessment and the technical quality of the study.

03

Mass effect and fluid spaces

Midline shift, effacement of sulci or basal cisterns and ventricular compression can indicate mass effect. Hydrocephalus describes abnormal ventricular enlargement from altered cerebrospinal-fluid circulation, while age-related atrophy can also enlarge ventricles through a different mechanism. Interpret the pattern rather than size alone. Suspected pressure effects or acute ventricular obstruction require timely communication and specialist review, not a routine follow-up note.

04

Trauma and bleeding patterns

Extra-axial blood may follow epidural or subdural distributions, while subarachnoid blood occupies sulci or cisterns. Classic shapes are useful teaching patterns but do not replace full review or expert reporting. Fractures, contusions and injury elsewhere may coexist. Persistent clinical concern after negative imaging needs a pathway-based reassessment, especially when symptoms worsen or when the examination was limited.

05

Spine and neurological warning signs

MRI is valuable for the spinal cord, cauda equina, discs and soft tissues, while CT provides useful bony detail in selected trauma. New weakness, saddle sensory change or bladder dysfunction with back pain can require urgent assessment for neural compression. A normal plain radiograph cannot exclude cord or cauda equina disease. Communicate the neurological findings clearly so that imaging priority and coverage match the clinical concern.

High-Yield Revision

  • Normal early CT does not exclude ischemic stroke.
  • Mass effect requires attention to ventricles and cisterns.
  • Spinal neurological warning signs need urgent clinical assessment.

Common Exam & Concept Pitfalls

  • Bright on CT is not always acute blood.
  • Normal spine radiographs do not exclude neural compression.

Sources & Further Reading

Curriculum and reference review: 25 September 2026. These original notes teach foundational imaging concepts and clinical reasoning. Interpretation of real studies and procedures requires supervised training. International guidance supports the principles below; local pathways, resources and authorized supervision govern patient care. Faculty review is pending.

RAHBAR study structure: clinical question → modality → technique → systematic findings → interpretation → communication. Use institutional curriculum and faculty guidance for supervised clinical skills and assessment requirements.