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Purpose To determine the diagnostic efficacy of power Doppler sonography (PDS) with spectral analysis for breast diseases, we retrospectively compared PDS and color Doppler sonography (CDS) in patients with breast lesions. Methods One hundred thirty‐eight women with palpable breast lesions were examined with PDS (65 women) and/or CDS (73 women). We calculated peak velocity, end‐diastolic velocity, pulsatility index (PI), and resistance index (RI). Results On a 4‐point subjective visual vascularity scale, PDS demonstrated higher vascularity than did CDS. Although smaller and more subtle vessels could be detected only with PDS, the PI and RI differed significantly between malignant and benign lesions when either PDS or CDS was used. However, logistic regression analysis showed that high PI and RI were associated with malignancy only when CDS was used. When PDS was used, PI was significantly higher in invasive ductal carcinomas with fibrous stroma and ill‐defined margins (associated with a poor prognosis) than in invasive ductal carcinomas without fibrous stroma or with well‐defined margins. Conclusions Doppler spectral analysis of malignant breast lesions using PDS may contribute to the determination of prognosis. © 1998 John Wiley & Sons, Inc. J Clin Ultrasound 26:231–238, 1998.

Although local area networks (LANs) are commonplace in hospital-based radiology departments today, wireless LANs are still relatively unknown and untried. A linked wireless reporting system was developed to improve work throughput and efficiency. It allows radiologists, physicians, and technologists to review current radiology reports and images and instantly compare them with reports and images from previous examinations. This reporting system also facilitates creation of teaching files quickly, easily, and accurately. It consists of a Digital Imaging and Communications in Medicine 3.0-based picture archiving and communication system (PACS), a diagnostic report server, and portable laptop computers. The PACS interfaces with magnetic resonance imagers, computed tomographic scanners, and computed radiography equipment. The same kind of functionality is achievable with a wireless LAN as with a wired LAN, with comparable bandwidth but with less cabling infrastructure required. This wireless system is presently incorporated into the operations of the emergency and radiology departments, with future plans calling for applications in operating rooms, outpatient departments, all hospital wards, and intensive care units. No major problems have been encountered with the system, which is in constant use and appears to be quite successful.

reast cancer is the most common type of cancer in women worldwide, with nearly 1.7 million new cases diagnosed in 2012, and is the second most common type of cancer overall. It represents about 12% of all new cancer cases and 25% of all cancers in women. 1 Sonography is an important modality that is frequently used in all aspects of breast imaging, including breast cancer screening, evaluation of palpable abnormalities, further characterization of lesions detected mammographically, and determining the method of percutaneous biopsy. 2 Advances in ultrasound technology include harmonic imaging, compound imaging, power Doppler imaging, faster frame rates, and higher-resolution transducers. Recently, elastography and three-dimensional sonography have also been used to evaluate breast lesions. 3 Norio Nakata, MD, Tomoyuki Ohta, MD, Makiko Nishioka, MD, Hiroshi Takeyama, MD, Yasuo Toriumi, MD, Kumiko Kato, MD, Hiroko Nogi, MD, Makiko Kamio, MD, Kunihiko Fukuda, MD Received October 16, 2014, ORIGINAL RESEARCHObjectives-This study was performed to evaluate the diagnostic utility of quantitative analysis of benign and malignant breast lesions using contrast-enhanced sonography.Methods-Contrast-enhanced sonography using the perflubutane-based contrast agent Sonazoid (Daiichi Sankyo, Tokyo, Japan) was performed in 94 pathologically proven palpable breast mass lesions, which could be depicted with B-mode sonography.Quantitative analyses using the time-intensity curve on contrast-enhanced sonography were performed in 5 region of interest (ROI) types (manually traced ROI and circular ROIs of 5, 10, 15, and 20 mm in diameter). The peak signal intensity, initial slope, time to peak, positive enhancement integral, and wash-out ratio were investigated in each ROI.Results-There were significant differences between benign and malignant lesions in the time to peak (P < .05), initial slope (P < .001), and positive enhancement integral (P < .05) for the manual ROI. Significant differences were found between benign and malignant lesions in the time to peak (P < .05) for the 5-mm ROI; the time to peak (P < .05) and initial slope (P < .05) for the 10-mm ROI; absolute values of the peak signal intensity (P < .05), time to peak (P < .01), and initial slope (P < .005) for the 15-mm ROI; and the time to peak (P < .05) and initial slope (P < .05) for the 20-mm ROI. There were no statistically significant differences in any wash-out ratio values for the 5 ROI types.Conclusions-Kinetic analysis using contrast-enhanced sonography is useful for differentiation between benign and malignant breast lesions.

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