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Ultrasound evaluation of normal and abnormal fetuses: comparison of conventional, tissue harmonic, and pulse-inversion harmonic imaging techniques.

Ryu JA, Kim B, Kim S, Yang SH, Choi MH, Ahn HS - Korean J Radiol (2003 Jul-Sep)

Bottom Line: For the brain, heart, abdomen and face, overall conspicuity at THI and PIHI was significantly better than at CUS (p < 0.05).There was, though, no significant difference between THI and PIHI.Both THI and PIHI appear to be superior to CUS for the evaluation of normal or abnormal structures, particularly the brain, heart, abdomen and face.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. bhkim@smc.samsung.co.kr

ABSTRACT

Objective: To determine the usefulness of tissue harmonic imaging (THI) and pulse-inversion harmonic imaging (PIHI) in the evaluation of normal and abnormal fetuses.

Materials and methods: Forty-one pregnant women who bore a total of 31 normal and ten abnormal fetuses underwent conventional ultrasonography (CUS), and then THI and PIHI. US images of six organ systems, namely the brain, spine, heart, abdomen, extremities and face were compared between the three techniques in terms of overall conspicuity and the definition of borders and internal structures.

Results: For the brain, heart, abdomen and face, overall conspicuity at THI and PIHI was significantly better than at CUS (p < 0.05). There was, though, no significant difference between THI and PIHI. Affected organs in abnormal fetuses were more clearly depicted at THI and PIHI than at CUS.

Conclusion: Both THI and PIHI appear to be superior to CUS for the evaluation of normal or abnormal structures, particularly the brain, heart, abdomen and face.

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Transverse scan through fetal kidneys: (A) CUS, (B) THI, (C) PIHI. The dilated renal pelvis (arrows) is clearly demonstrated by all three techniques, though soft tissue contrast is clearest at PIHI. Note the presence of the smallest near-field artifact (arrowheads) at PIHI.
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Figure 4: Transverse scan through fetal kidneys: (A) CUS, (B) THI, (C) PIHI. The dilated renal pelvis (arrows) is clearly demonstrated by all three techniques, though soft tissue contrast is clearest at PIHI. Note the presence of the smallest near-field artifact (arrowheads) at PIHI.

Mentions: In the ten abnormal fetuses, the abnormality was more clearly delineated at both THI and PIHI than at CUS (p < 0.05) (Table 3). This was so, for example, for a body-wall defect and a liver-containing sac in the fetus with omphalocele. The dilated renal pelvis present in two fetuses was clearly depicted using all three techniques, though soft-tissue contrast was slightly better and the near-field artifact was smaller at THI and PIHI than at CUS (Fig. 4). In the two fetuses with echogenic thoracic masses, the lesions contrasted better with surrounding normal lung at THI and PIHI than at CUS. In the two fetuses with a facial cleft, the lesions were clearer at THI and PIHI than at CUS.


Ultrasound evaluation of normal and abnormal fetuses: comparison of conventional, tissue harmonic, and pulse-inversion harmonic imaging techniques.

Ryu JA, Kim B, Kim S, Yang SH, Choi MH, Ahn HS - Korean J Radiol (2003 Jul-Sep)

Transverse scan through fetal kidneys: (A) CUS, (B) THI, (C) PIHI. The dilated renal pelvis (arrows) is clearly demonstrated by all three techniques, though soft tissue contrast is clearest at PIHI. Note the presence of the smallest near-field artifact (arrowheads) at PIHI.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2698086&req=5

Figure 4: Transverse scan through fetal kidneys: (A) CUS, (B) THI, (C) PIHI. The dilated renal pelvis (arrows) is clearly demonstrated by all three techniques, though soft tissue contrast is clearest at PIHI. Note the presence of the smallest near-field artifact (arrowheads) at PIHI.
Mentions: In the ten abnormal fetuses, the abnormality was more clearly delineated at both THI and PIHI than at CUS (p < 0.05) (Table 3). This was so, for example, for a body-wall defect and a liver-containing sac in the fetus with omphalocele. The dilated renal pelvis present in two fetuses was clearly depicted using all three techniques, though soft-tissue contrast was slightly better and the near-field artifact was smaller at THI and PIHI than at CUS (Fig. 4). In the two fetuses with echogenic thoracic masses, the lesions contrasted better with surrounding normal lung at THI and PIHI than at CUS. In the two fetuses with a facial cleft, the lesions were clearer at THI and PIHI than at CUS.

Bottom Line: For the brain, heart, abdomen and face, overall conspicuity at THI and PIHI was significantly better than at CUS (p < 0.05).There was, though, no significant difference between THI and PIHI.Both THI and PIHI appear to be superior to CUS for the evaluation of normal or abnormal structures, particularly the brain, heart, abdomen and face.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. bhkim@smc.samsung.co.kr

ABSTRACT

Objective: To determine the usefulness of tissue harmonic imaging (THI) and pulse-inversion harmonic imaging (PIHI) in the evaluation of normal and abnormal fetuses.

Materials and methods: Forty-one pregnant women who bore a total of 31 normal and ten abnormal fetuses underwent conventional ultrasonography (CUS), and then THI and PIHI. US images of six organ systems, namely the brain, spine, heart, abdomen, extremities and face were compared between the three techniques in terms of overall conspicuity and the definition of borders and internal structures.

Results: For the brain, heart, abdomen and face, overall conspicuity at THI and PIHI was significantly better than at CUS (p < 0.05). There was, though, no significant difference between THI and PIHI. Affected organs in abnormal fetuses were more clearly depicted at THI and PIHI than at CUS.

Conclusion: Both THI and PIHI appear to be superior to CUS for the evaluation of normal or abnormal structures, particularly the brain, heart, abdomen and face.

Show MeSH
Related in: MedlinePlus