What is the signal characteristic of renal stones on MRU?
high signal on T1-weighted images
high signal on T2-weighted images
low signal on T1-weighted images
none of the above
Correct Answer :
D. none of the above
renal stones and calcifications have no signal characteristics. Therefore, they appear as a signal void.
Related Questions
Which of the following is NOT an indication of renal arteriography?
preparation for donor nephrectomy
advanced RCC in the right kidney
renal artery stenosis
oncocytoma in the left kidney
What is (are) the indication(s) of renal artery embolization?
bleeding angiomyolipomas
an alternative to nephrectomy in severe uncontrolled hypertension among patients with end-stage renal disease
renal artery aneurysms or symptomatic AV malformations
all of the above
What is the emergency treatment of intravenous contrast allergy?
epinephrine
atropine
hydrocortisone
antihistamine
Using ultrasonography, which testicular lesion is described as a solid, round, homogeneous, low-reflectivity tumor mass, with no calcification?
seminoma
embryonal cell tumor
mixed germ cell tumor
epidermoid cyst
Which statement is false concerning complications of left renal artery embolization?
embolizing the non-target artery might occur
severe pain at the renal area could occur
complications depend on the embolic agent
reactive left pulmonary edema
What is true concerning Tc-99m DTPA?
Its uptake by glomerular filtration is almost 100%
It helps evaluate cortical structure and morphology
It provides a static picture of kidneys when compared to MAG3
it binds to the sulfhydryl groups in proximal tubules resulting in much higher resolution pinhole SPECT imaging
What is correct concerning sound waves?
The higher the frequency, the deeper tissue penetration
The higher the frequency, the better the axial resolution
low-frequency transducers are of 6 to 10 MHz
the deeper tissue penetration, the better axial resolution
Ultrasonic 3.5 MHz curved array probe is suitable to detect:
epididymal cysts
testicular tumors
renal stones
penile vasculature
Using ultrasonography, which testicular lesion is of low reflectivity with irregular borders, hypervascular rims but no internal vascularity to mention?
intratesticular hematoma
testicular abscess
orchitis
sex cord stromal tumors
Which ultrasound mode is able to depict motion direction and flow velocity?
grey-scale
simultaneous bilateral views
color Doppler
power Doppler
By ultrasonography, when kidneys appear darker than the liver, they are:
hypoechoic
hyperechoic
anechoic
isoechoic
On clinical examination, what accidental finding has NO connection to renal cancer?
unilateral hydrocele
bilateral varicocele
calcifications at the renal area on plain KUB film
painless hematuria
What is false on comparing Tc-99m DTPA to Tc-99m MAG3?
DTPA provides better quality images with renal insufficiency
by giving captopril, MAG3 plasma clearance declines in hypertensive patients with renal artery stenosis but rises in those who do not have the disease
DTPA provides an excellent measurement of GFR
in pediatrics, MAG3 provides better quality images than DTPA
Which of the following is NOT an indication of static cystography?
evaluating a probable bladder rupture
evaluating a probable colovesical or vesicovaginal fistulae
evaluating a probable intravesical pathology
evaluating a probable bladder diverticula
Using ultrasonography, which testicular lesion is cystic with heterogeneous echoes representing a mixture of mucinous and/or sebaceous material with or without hair follicles, cartilages, and bones?
non-seminomatous germ cell tumors
acute bleed on top of old hematoma
mature teratoma
sex cord stromal tumors
What is false concerning ureteric jets?
obstruction of the upper urinary tract may increase renal pelvis pressure and delay or decrease pelvis peristaltic rates
measured by color Doppler flow mapping in transverse scans at the suprapubic region
patients with ureteral stents are the ideal
adequate hydration is necessary
On sagittal plane of midline TRUS, which structure might NOT be visible?
peripheral zone of the prostate
ejaculatory duct
tip of the right seminal vesicle
tip of the left lateral lobe of the prostate
Which statement is true concerning renal ultrasonography?
end-stage renal failure kidneys look small and hypoechoic
it is more accurate on diagnosing cystic lesions than solid masses
it is able to detect tumors as small as 2 mm
cortical carbuncle might be mistaken for hydronephrosis
Which statement is false concerning diuretic nuclear scintigraphy renogram?
an elimination T ½ < 10 minutes indicates obstructed system
the diuretic must be given at the maximum kidney activity
If ureteral stents are in place, the bladder catheter must be unclamped
99mTc-MAG3 is the agent of choice to study differential renal function and obstruction
What is the optimal time for viewing the renal parenchyma after injecting a contrast material during IVU study?
0 minute
5 minutes
10 minutes
renal parenchyma does not appear on IVU
What nuclear medicine study can diagnose interstitial nephritis?
DTPA
DMSA
gallium-67
MAG-3
Which radiological modality carries the highest radiation hazard?
nuclear medicine
ultrasonography
X-ray fluoroscopy
intravenous urography
Which of the following is NOT an indication of retrograde pyelography?
evaluation of probable ureteral obstruction
in conjunction with ureteroscopy
evaluation of hematuria
evaluation of probable ureterovesical reflux
Which of the following is an indication of VCUG?
repeated febrile UTI in children
evaluating a probable posterior urethral valve
a & b
none of the above
Which statement is false concerning plain KUB film?
reliable tool to exclude urinary calculi
calcifications at renal area might lead to the discovery of renal cancers
can detect soft tissues
fecoliths and phleboliths could be mistaken for calculi
Which statement concerning phlebolith is false?
can be mistaken for a ureteral stone
is a small single, usually spiky, calcification within a vein
the amount of phleboliths increases with age
appears more often on the left than on the right side of the pelvis
What is (are) the characteristic finding(s) of testicular torsion on color Doppler ultrasonography?
the classic blue dot sign
thick, short, edematous spermatic cord
absence of intratesticular blood flow
increased epididymal blood flow
Which condition does NOT show a false positive result for hydronephrosis on ultrasonic examination?
hydrocalicosis
extrarenal pelvis
parapelvic cyst
class 2 Bosniak renal cyst
What is the minimum estimate of GFR to take gadolinium-based contrast agents?
more than 30 mL/min/1.73 m2
more than 60 mL/min/1.73 m2
more than 90 mL/min/1.73 m2
none of the above
How does a full bladder appear on ultrasonography?
hyperechoic
hypoechoic
isoechoic
anechoic