86) Explanation





•• Most common site of diverticulosis is the sigmoid colon in as many as 95% of patients with cecum being involved in 5% of patients.
•• Reasons for sigmoid colon being the main site of diverticulosis and leading to saw tooth appearanceƒƒ Sigmoid colon is the narrowest portion of the colon, and generates the highest intra-segmental pressures
ƒƒ Combination of numerous haustra and dehydrated stool in the sigmoid colon leads to segmentation, in which the sigmoid colon functions as multiple small compartments.

87) Explanation





DRYNESS OF MOUTH is the most common complication
noted in patients undergoing radiotherapy of head and
neck CA.

Correct Answer - B
Scans to differentiate adrenal adenoma from adrenal metastasis are:
CECT -
Chemical shift MRI
FDG-PET
PETscan has almost 100 % sensitivity for detecting adrenal metastasis, so a negative
study excludes the possibility of adrenal mets. But adenomas can give false positive test.
Ref: Fundamentals of Diagnostic Radiology, Edition - 4, Page - 427.

Correct Answer - C
Helium ion has maximum ionizing potential.
The ionizing potential of atoms ranges from a few eV for alkali elements to 24.6eV for
helium which has the maximum ionizing potential.
Ref: Radiation Physics for Medical Physicists By Ervin B. Podgoršak, Page 7

Correct Answer - A
Answer is A (Doppler flow USG):
'Stenosis at the origin of the internal carotid Artery can be identified
and quantified reliably by ultrasonography that combines B mode
ultrasound image with a Doppler ultrasound assessment of flow
velocity.'

Correct Answer - A
Ans. MRI scan
It is the best imaging modality for the breasts of women with
implants.
MRI can be usefirl to distinguish scar from recurrence in women who
have had previous breast conservation therapy for cancer

93)50 year old male presents with fever and malaise for 4 months& pain in the knees and ankles. Blood tests are normal apart from a raised ESR. Chest x-ray shows bilateral hilar adenopathy and pulmonary infiltrates most severe in the upper and mid zones. Mantoux test is negative. What is the most likely diagnosis

Correct Answer - B

Answer- B. Sarcoidosis

Sarcoidosis is the most likely diagnosis given the presentation with malaise, arthralgia and a chest x-ray showing bilateral hilar adenopathy.

"The characteristic radiological finding in patients with pulmonary sarcoidosis is bilateral hilar lymphadenopathy"

Correct Answer - C
Answer- C. Coracoid process
From superior to inferior (important structure on X-ray sholder) :-
Clavicle : Acromian : Coracoid : Superior margin of humeral head :
greater tubercle : anatomical neck : surgical neck

Correct Answer - D
Answer- D. Lordotic
The lordotic view is also useful for recognizing collapse of lingula or
middle lobe when these areas become very thin and cast minimal
shadow on the PA view