Abstract
This study was to explore the application of a 50% iterative reconstruction algorithm in the diagnosis of exercise-induced abdominal pain (AP) with color Doppler imaging, the changes of liver and gallbladder, and portal vein before and after the exercise. 108 students with exercise-induced AP caused by mid- and long-distance running from May 30, 2019, to April 15, 2020, were selected as the research objects in this study. They were performed with the color Doppler flow image (CDFI). An iterative reconstruction (IR) with a weight of 50% was adopted for image reconstruction, and the reconstructed images were evaluated subjectively and objectively. Then, the maximum liver diameter (MLD), gallbladder width (GW), and portal vein diameter (PVD) were recorded before and after the exercise. The results showed that the SNR and CNR after ultrasound image reconstruction (UIR) (1.07 ± 0.58 and 3.59 ± 0.61, resp.) were increased greatly in contrast to the values before the UIR (7.36 ± 1.15 and 1.07 ± 0.58, resp.) ( p < 0.05 ); the score after the UIR (4.38 ± 0.59) was obviously higher than that before the UIR (3.52 ± 0.41) ( p < 0.05 ); the MLD of the subject at the 12th minute during the exercise was observably smaller than that at the 0th minute ( p < 0.05 ) while the MLD of the subject at the 12th minute after the exercise was greatly larger than that at the 0th minute ( p < 0.05 ); the GW of the subject during and after the exercise was not changed considerably; and the PVD of the subject at the 12th minute during the exercise was larger greatly than that at the 0th minute ( p < 0.05 ). In short, the quality of the reconstructed image based on the IR and noise index was better than that of the original ultrasound image because the interference of artifacts and noise was reduced. After exercise, the liver volume decreased, while the PVD increased, resulting in exercise-induced AP.
Highlights
abdominal pain (AP) is a relatively common symptom during exercise, especially in middle- and long-distance running, race walking, cycling, and other events. e causes of AP during exercise are more complex
Some studies have shown that the cause of AP during exercise may be liver ischemia instead of blood congestion. is theory believes that the body will promote the adrenal medulla to secrete epinephrine and norepinephrine during exercise, which will cause the internal organs of the abdominal cavity to contract
It revealed that maximum liver diameter (MLD) of the subject at the 0th, 6th, 12th, 18th, and 24th minutes during the exercise was 136.66 ± 0.25 mm, 132.09 ± 0.18 mm, 124.57 ± 0.17 mm, 123.05 ± 0.28 mm, and 122.96 ± 0.31 mm, respectively, of which the MLD of the subjects decreased obviously after the 12th minute during the exercise comparing to the value at the 0th minute (p < 0.05)
Summary
AP is a relatively common symptom during exercise, especially in middle- and long-distance running, race walking, cycling, and other events. e causes of AP during exercise are more complex. One of the more common views at present is the theory of liver and spleen congestion during exercise, which refers to that vigorous operation may lead to blood sugar deficiency and congestion in the liver, resulting in pain in the liver area [4]. Some studies have shown that the cause of AP during exercise may be liver ischemia instead of blood congestion. Is theory believes that the body will promote the adrenal medulla to secrete epinephrine and norepinephrine during exercise, which will cause the internal organs of the abdominal cavity to contract. Related statistic data shows that the blood flow of internal organs will be reduced by about 78% during strenuous exercise, resulting in extreme ischemia. Related statistic data shows that the blood flow of internal organs will be reduced by about 78% during strenuous exercise, resulting in extreme ischemia. erefore, this article intends to discuss the mechanism of exerciseinduced AP based on the above descriptions
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