basic radiology

Glioblastoma.
Glioblastomas are a fast growing type of brain tumour. They are the most common type of cancerous (malignant) brain tumour in adults.

Glioblastomas are a type of brain tumour that belongs to a group of brain tumours called gliomas.

Basal ganglia anatomy CT

Male pelvic MRI anatomy

Sagittal view of a chest CT

Abdominal CT anatomy

How to read a CT☝️

Gallbladder 👆

MRI

➡️T1: It’s for anatomy, so brain structures reflect the same color as real life. So gray matter is gray on T1 & white matter is white on T1. It’s also for contrast. Contrast material is taken up by masses making them light up & them easier to see.

➡️T2: It’s the water sensitive sequence. What is pathologic water in the brain? Edema! My attending once said, “Everything bad in this world is trying to turn you back into what you came from—water."

➡️DWI: Diffusion detects stroke, which are bright on diffusion. But anything that makes space tight in the brain can be bright on diffusion (highly cellular masses, clotted blood, pus under pressure, etc.)

➡️Gradient: Gradient is sensitive to metals. And what’s the most important metal in body? Iron—bc iron is in blood. So gradient is our blood sensitive sequence

1. Liver (purple)
2. Spleen (pink)
3. Location of the pancreas (white outline) – not normally visualized

1. Right kidney (red)
2. Left kidney (red)
3. Location of right ureter (white outline) – not normally visualized
4. Location of left ureter (white outline) – not normally visualized
5. Urinary bladder (orange)
6. Gas in the rectum (green)
7. Location of right adrenal gland (white outline) – not normally visualized
8. Location of left adrenal gland (white outline) – not normally visualized
9. Location of the gallbladder (white outline) – not normally visualized

𝘽𝙧𝙚𝙖𝙨𝙩 𝙐𝙎

Mass US criteria (𝙘𝙝𝙖𝙧𝙖𝙘𝙩𝙚𝙧)

𝑩𝒆𝒏𝒊𝒈𝒏

•Shape oval, round

•Smooth thin margin

•Consistency texture ( homogenous-internal echoes)

•Not deep expansion (wide)

•No acoustic attenuation

•No micro calcification

•No ill-defined cystic changes

•Normal vascularity (by Doppler)

•No associated axially LNP

PSV-Peak systolic velocity
EDV-End-diastolic velocity
MDV-minimum diastolic velocity
RI -Resistive index
PI-Pulsatility index
TAPV-Time Average Peak Velocity.
S/D -The systolic / diastolic ratio

Pt Known IBD Hx.


1.What is your comment on the x-rays?
2. What is the differential diagnosis?
3. Sopt diagnosis?

Ultrasound Criteria of Adenomyosis (According to MUSA) :

• Global increase in the size of uterus (we call it BULKY uterus).

• Asymmetrical thickening (Posterior wall is larger than anterior wall).

• Sub-endometrial cysts.

• Sub-endometrial echogenic lies / buds.

• Fan-shaped shadowing (Venetian blind artifacts).

• Interrupted junctional zone (we call it indistinct endometrial-myometrial interface).




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