[Ultrasound examination of the breast with 7.5 MHz and 13 MHz-transducers: scope for improving diagnostic accuracy in complementary breast diagnostics?].

Aim: Complementary diagnostic methods in early diagnosis of breast cancer are used to increase diagnostic accuracy and minimize unnecessary invasive diagnostic procedures. Aim of the following prospective, open multicenter clinical study was to define the value of high-frequency breast ultrasound with 13 MHZ transducers compared to standard breast ultrasound with 7.5 MHz.

[3D ultrasound in core breast biopsy].

Aim: To evaluate the potential of three-dimensional ultrasound (3D US) in core biopsy of suspicious breast lesions.

Method: 3D US controlled core biopsy was performed in 107 breast masses in 100 women by using an automated biopsy system (11G coaxial needle, 12 G biopsy needle). Mean diameter of the lesions was 1.

[Experimental investigations at the new digital mammographic system].

Purpose: Experimental investigations of a new digital mammography system.

Materials And Methods: The digital mammography system SenoScan (Fischer Imaging) is based on 4 charged coupled devices (CCD) (slot detector). The pixel size is 50 micro m, field of view 21 x 29 cm (2), effective quantum efficiency (DQE) (0) 50 %, spatial resolution 10 lp/mm, and memory depth 12 bit.

[Film-screen mammography versus digital storage plate mammography: hard copy and monitor display of microcalcifications and focal findings--a retrospective clinical and histologic analysis].

Purpose: A retrospective clinical-histological study to determine the diagnostic accuracy of mammography using conventional screen-film cassettes (hard copy), high-resolution digital phosphor storage plates (hard copy) and monitor display (soft copy) for microcalcifications and focal lesions (BI-RADS (TM) category 4 or 5).

Materials And Methods: From April to November 2001, 76 patients underwent conventional film-screen mammography and, after diagnosis and preoperative wire localization, digital mammography with the same exposure parameters. Five investigators retrospectively determined the diagnosis after the operation from randomly distributed mediolateral views (hard-copy reading) and from the monitor display (soft-copy reading).

[Sonographical breast biopsy: how many core biopsy specimens are needed?].

Purpose: To determine the optimum number of specimens of a sonographically guided core biopsy of the breast.

Materials And Methods: From January 2001 to April 2001, sonographically guided core biopsies (coaxial needle: 11 G; core needle: 12 G) were performed on 106 patients with 115 BI-RADS trade mark 4-5 lesions that had corresponding sonographic findings. Five specimens were obtained in anteroposterior direction parallel to the chest wall and each specimen examined histologically.