Добавил:
Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
Atlas of Human Body Ultrasound Scanning_ Methods and Diagnostic Applications ( PDFDrive ).pdf
Скачиваний:
177
Добавлен:
29.07.2022
Размер:
40.13 Mб
Скачать

5  The Breast Scanning

51

 

 

2.3\ Clinical Application Value

A small amount of dot or strip blood flow signal can be detected in the normal breast, and the diameter of the blood flow is uniform. The blood

flow of the breast should be observed. The distribution (peripheral and internal), the number, and the morphology of the blood flow should be observed when we find any abnormal blood flow signal.

52

Z. Qi

 

 

3\ The Normal Doppler

Spectrum of the Breast in

Women of Childbearing Age

Fig. 5.3  The normal Doppler spectrum of the breast in women of childbearing

3.1\ Scanning Method

Based on two-dimensional and color Doppler scanning, start pulsed Doppler. According to the diameter of the blood vessel, flexibly adjust the sampling volume. Try to make the included angle between the sound beam and the blood flow signal to be less than 60°.

3.2\ Section Structures

Mammary gland structure at upper of figure, Doppler spectrum at below.

3.3\ Measurement Method

and Normal Value

No normal breast Doppler velocity was reported. But Cao Jiufeng et al. reported that using 12 cm/s as cutoff value, the ideal critical velocity for the differentiation between benign and malignant, the diagnosis for less than 2 cm in diameter of breast cancer, the sensitivity, specificity, and accuracy were 95.5%, 100%, and 96.6%, respectively.

3.4\ Clinical Section Value

It is a low velocity and low resistance blood flow spectrum in the normal breast.

5  The Breast Scanning

53

 

 

4\ Scanning of the Normal

Breast in the Middle

and Late Pregnancy

Fig. 5.4

Ultrasonography of the normal breast in the middle and late pregnancy

4.1\ Scanning Method

Patients lie on the back. Patients could lie on the contralateral side when examining the outer

quadrant. Continuously take longitudinal and transverse scanning or radial scanning along the nipple. The breast duct can be better displayed by the radial scanning.

54

Z. Qi

 

 

4.2\ Section Structures

From superficial to deep in order: skin, subcutaneous fat, mammary gland, ectopectoralis

4.3\ Clinical Application Value

To understand the sonographic characteristic of the breast in the middle and later period of pregnancy. In the middle of pregnancy, the number and size of

mammary acini have increased significantly; gland cavity has slight expansion and contains a small amount of secretions. A large number of newborn mammary duct and mammary acini are formed during late pregnancy; the connective tissue between interlobular is reduced significantly; mammary gland is thicker than the normal, thinning around fat. Duct shows hypoecho or hyperecho. Breast stroma shows regular sheet-like or strip of unequal thickness structure. Glandular lobe and thickened duct weave honeycomb echo.

5  The Breast Scanning

55

 

 

5\ Ultrasound Images

of Normal Mammary Ducts

in Lactating Women

Fig. 5.5  Ultrasound images of the normal mammary ducts in lactating women 16 is mammary ducts

1

2

 

6

4

5

3