Erratum: Comprehensive ultrasonographic evaluation of normal and fibrotic kidneys in a mouse model with an ultra-highfrequency transducer

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Ultrasonography. 2025;44(1):92-93

Publication date (electronic) : 2024 December 30

doi : https://doi.org/10.14366/usg.24024.ER

Myoung Seok Lee ¹, Jeong Yeon Cho ²^,³, Min Hoan Moon ¹^,³, Jeonghwan Lee ⁴^,⁵, Jung Pyo Lee ⁴^,⁵^,⁶, Nayeon Shin ⁴, Wencheng Jin ⁴^,⁵, Ara Cho ⁶

¹Department of Radiology, Seoul National University Boramae Medical Center, Seoul, Korea

²Department of Radiology, Seoul National University Hospital, Seoul, Korea

³Department of Radiology, Seoul National University College of Medicine, Seoul, Korea

⁴Department of Internal Medicine, Seoul National University Boramae Medical Center, Seoul, Korea

⁵Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea

⁶Translational Medicine Major, Seoul National University College of Medicine, Seoul, Korea

Ultrasonography 2024;43:314-326

https://doi.org/10.14366/usg.24024

The authors and publisher of the article would like to bring the reader’s attention to errors in Fig. 4B on page 320 and associated main body paragraph on page 319.

The revised version of Fig. 4B should be as follows:

Subsequently, the revised version legend for Fig. 4 should be as follows. Changes are marked in underline.

Fig. 4.

Fig. 4. Correlation of ultra-high-frequency ultrasonography image and histologic structure of normal mouse kidney.

A, B. Axial scan of a normal mouse kidney using a 33 MHz linear transducer (A) and Periodic acid–Schiff staining (×40) (B) are shown. In an ultrasonography image, the outer hyperechoic layer (red bracket) corresponds to the cortex (C) and the outer stripe of the outer medulla (OSOM), the middle hypoechoic layer (green bracket) corresponds to the inner stripe of the outer medulla (ISOM), and the inner hyperechoic layer (yellow bracket) corresponds to the inner medulla (IM) and the renal papilla (P).

And finally, the 2nd sentence of the 2nd paragraph (Grayscale US) in Results section should be changed as follows:

Grayscale US

In grayscale US using a 33 MHz UHF transducer, a three-layer configuration was observed in most of the normal mouse kidney parenchyma (Fig. 4), both completely and discontinuously (35 of 36 normal kidneys). The inner stripe of the outer medulla, which appeared low-echoic, was often seen discontinuously and was absent in one kidney. When using an 18 MHz linear transducer, the layered structure was poorly differentiated compared to images obtained with the 33 MHz transducer (Fig. 2B, C) in all normal mice. In fibrotic kidneys, regardless of the type of injury, the kidney parenchyma became heterogeneously echoic, and corticomedullary differentiation was obscured in most cases due to a decrease in the echo of the outer layer (33 of 40 fibrotic kidneys) (Fig. 3C).

The mean size and PT of normal mouse kidneys were significantly greater than those of the fibrotic kidneys (P<0.001). The non-UUO kidneys were significantly smaller than both the normal and UUO kidneys (P<0.001) (Fig. 5A). There was no significant difference in PT between the UUO and non-UUO kidneys (Fig. 5B).

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