quiz 2

Question 1

Lateral ventricle width is normal up to ____ mm.

Answer 1

10

Question 2

For long bone measurements of the fetus, calipers are placed at the?

Answer 2

bone-cartilage interface.

Question 3

The circular structure visualized between 4 and 10 weeks that supplies nutrition to the developing embryo is the ___________.

Answer 3

yolk sac

Question 4

As a trimester progresses, the crown rump length and amniotic sac diameter increase ___ mm a day.

Answer 4

1

Question 5

A yolk sac is considered abnormal if it is larger than ____ mm.

Answer 5

6

Question 6

If an embryo is not visualized within the gestational sac, the GA in weeks can be determined by measuring the mean sac diameter and adding ____ to it.

Answer 6

3 mm

Question 7

Placenta previa can be ruled out if the placenta is _______ cm from the internal os.

Answer 7

2

Question 8

Normal gut herniation should not be seen after the ______ GA week.

Answer 8

twelfth

Question 9

The abdominal circumference (AC) is measured through a single plane of section that demonstrates where the..?

Answer 9

umbilical vein branches and the left and right portal veins are continuous with one another.

Question 10

The BPD can be measured

Answer 10

through any plane of section that demonstrates a symmetrical view of the short axes of the third ventricle and thalami.

Question 11

Male gender can be established from the early second trimester by identifying the..?

Answer 11

scrotum

Question 12

When the umbilical cord enters the fetus…?

Answer 12

the umbilical vein courses cephalad to join portal circulation and the umbilical arteries run along each side of the urinary bladder.

Question 13

Between the twelfth and sixteenth gestational weeks, the amniotic cavity has enlarged enough to

Answer 13

obliterate the chorionic cavity

Question 14

A tail-like appendage is often identified at the site of the embryo’s rump. With development it

Answer 14

regresses

Question 15

When the yolk sac, embryonic disk, and developing amniotic membrane are visualized together it is described as the

Answer 15

double bleb sign.

Question 16

An intrauterine pregnancy can be confirmed before visualization of the yolk sac by identifying the

Answer 16

double sac sign

Question 17

The intradecidual sign

Answer 17

describes an early intrauterine pregnancy adjacent to the endometrial cavity.

Question 18

when scanning the fetus, the first thing to do is…?

Answer 18

determine fetal presentation

Question 19

the sonographic landmark for locating early cardiac activity is the

Answer 19

yolk sac

Question 20

using a 28-day menstrual cycle, most radiologists and obstetricians define the first trimester as the

Answer 20

12 weeks beginning with the first day of the last normal menstrual period

Question 21

Landmarks for BPD/HC measurement;

Answer 21

thalami_,Falx cerebri, CSP (cavum septum pellucidum) and 3rd ventricle

Question 22

BPD should be measured

Answer 22

outer to inner

Question 23

HC should be measured ?

Answer 23

outer to outer

Question 24

Landmark for AC

Answer 24

Rounded abdomen Stomach bubble, 3 dots of spine and junction of umbilical vein with LPV.

Question 25

There are 4 VENTRICLE

Answer 25

• Two Lateral ventricle with 4 segments

- frontal horn (on both sides of CSP), body(atrium), occipital horn, temporal horns.

Question 26

the normal measurement for cisterna magna is

Answer 26

10mm

Question 27

normal measurement for NF thickness is ?

Answer 27

6mm

Question 28

The nuchal fold thickness is considered normal if under

Answer 28

5mm between 16 -18 weeks gestation

Question 29

Nuchal fold thickness between 16 -24 weeks is?

Answer 29

6mm

Question 30

Trans cerebellar Measurement correspond more or less to GA until which week?

Answer 30

25 week