Ultrasound diagnostic apparatus and control method for ultrasound diagnostic apparatus

1 . An ultrasound diagnostic apparatus comprising:

a processor configured to

detect a detection target captured in an ultrasound image,

detect a posterior acoustic shadow of the detection target or an enhanced posterior echo of the detection target, the posterior acoustic shadow or the enhanced posterior echo being included in the ultrasound image,

automatically set, on the ultrasound image, a first region of interest that includes the detection target and the posterior acoustic shadow, or the detection target and the enhanced posterior echo, and of which an edge is represented by a closed frame line that has a side that extends along a sound line of the ultrasound image, and

superimpose the first region of interest on the ultrasound image,

wherein the detection target is located closer to shallower side end of the first region of interest than deeper side end of the first region of interest.

2 . The ultrasound diagnostic apparatus according to claim 1 ,

wherein the processor is further configured to

set the first region of interest for the detection target in which an enhancement of the posterior echo of the detection target is equal to or higher than a predetermined level, and

set a second region of interest of which a position relative to the detection target is different from that of the first region of interest for the detection target in which the enhancement of the posterior echo of the detection target is less than the predetermined level.

3 . The ultrasound diagnostic apparatus according to claim 2 ,

wherein the second region of interest is a region having a position relative to the detection target such that the detection target is located in a central part within the second region of interest.

4 . The ultrasound diagnostic apparatus according to claim 3 ,

wherein the first region of interest has a length in a depth direction of at least 2 times and no more than 5 times a length of the detection target in the depth direction, and the second region of interest has a length in the depth direction of at least 1 time and less than 2 times the length of the detection target in the depth direction.

5 . The ultrasound diagnostic apparatus according to claim 1 ,

wherein the processor is further configured to

set the first region of interest for a feces inside a rectum which is the detection target, and

set a second region of interest of which a position relative to the detection target is different from that of the first region of interest for an empty rectum which is the detection target.

6 . The ultrasound diagnostic apparatus according to claim 5 ,

wherein the second region of interest is a region having a position relative to the detection target such that the detection target is located in a central part within the second region of interest.

7 . The ultrasound diagnostic apparatus according to claim 6 ,

wherein the first region of interest has a length in a depth direction of at least 2 times and no more than 5 times a length of the detection target in the depth direction, and the second region of interest has a length in the depth direction of at least 1 time and less than 2 times the length of the detection target in the depth direction.

8 . The ultrasound diagnostic apparatus according to claim 1 ,

wherein the processor is further configured to

set the first region of interest for a cyst which is the detection target, and

set a second region of interest of which a position relative to the detection target is different from that of the first region of interest for a tumor which is the detection target.

9 . The ultrasound diagnostic apparatus according to claim 8 ,

wherein the second region of interest is a region having a position relative to the detection target such that the detection target is located in a central part within the second region of interest.

10 . The ultrasound diagnostic apparatus according to claim 9 ,

wherein the first region of interest has a length in a depth direction of at least 2 times and no more than 5 times a length of the detection target in the depth direction, and the second region of interest has a length in the depth direction of at least 1 time and less than 2 times the length of the detection target in the depth direction.

11 . The ultrasound diagnostic apparatus according to claim 1 , further comprising:

an ultrasound probe, and

wherein the processor is further configured to acquire the ultrasound image using the ultrasound probe.

12 . An ultrasound diagnostic apparatus comprising:

a processor configured to

store in advance, with relating each other, a plurality of examination modes corresponding to a plurality of detection targets, and a plurality of sizes of an extended region occupying between each of the plurality of detection targets and a deeper side end of a region of interest,

input an examination mode for a captured detection target in an ultrasound image, among the plurality of examination modes, and

automatically set, on the ultrasound image, a first region of interest that includes the captured detection target and that has a size of the extended region corresponding to the examination mode, the region of interest having an edge that extends along a sound line of the ultrasound image,

wherein the extended region corresponds to a posterior acoustic shadow of the detection target or an enhanced posterior echo of the detection target, the posterior acoustic shadow or the enhanced posterior echo being included in the ultrasound image.

13 . The ultrasound diagnostic apparatus according to claim 12 ,

wherein the processor is further configured to

set the first region of interest for the examination mode indicating a feces inside a rectum as the detection target or a cyst as the detection target, and

set a second region of interest of which a position relative to the detection target is different from that of the first region of interest for the examination mode indicating an empty rectum as the detection target or a tumor as the detection target.

14 . The ultrasound diagnostic apparatus according to claim 13 ,

wherein the second region of interest is a region having a position relative to the detection target such that the detection target is located in a central part within the second region of interest.

15 . The ultrasound diagnostic apparatus according to claim 14 ,

wherein the first region of interest has a length in a depth direction of at least 2 times and no more than 5 times a length of the detection target in the depth direction, and the second region of interest has a length in the depth direction of at least 1 time and less than 2 times the length of the detection target in the depth direction.

16 . The ultrasound diagnostic apparatus according to claim 12 , further comprising:

an ultrasound probe, and

wherein the processor is further configured to acquire the ultrasound image using the ultrasound probe.

17 . A control method for an ultrasound diagnostic apparatus, comprising:

detecting a detection target captured in an ultrasound image;

detecting a posterior acoustic shadow of the detection target or an enhanced posterior echo of the detection target, the posterior acoustic shadow or the enhanced posterior echo being included in the ultrasound image;

automatically setting, on the ultrasound image, a first region of interest that includes the detection target and the posterior acoustic shadow, or the detection target and the enhanced posterior echo, and of which an edge is represented by a closed frame line that has a side that extends along a sound line of the ultrasound image; and

superimposing the first region of interest on the ultrasound image,

wherein the detection target is located closer to shallower side end of the first region of interest than deeper side end of the first region of interest.

18 . A control method for an ultrasound diagnostic apparatus, comprising:

storing in advance, with relating each other, a plurality of examination modes corresponding to a plurality of detection targets, and a plurality of sizes of an extended region occupying between each of the plurality of detection targets and a deeper side end of a region of interest;

inputting an examination mode for a captured detection target in an ultrasound image, among the plurality of examination modes; and

automatically setting, on the ultrasound image, the region of interest that includes the captured detection target and that has a size of the extended region corresponding to the input examination mode, the region of interest having an edge that extends along a sound line of the ultrasound image,

wherein the extended region corresponds to a posterior acoustic shadow of the detection target or an enhanced posterior echo of the detection target, the posterior acoustic shadow or the enhanced posterior echo being included in the ultrasound image.