ISSN:0894-8771    

出版商:OVID    

年代:2003

数据来源: OVID

摘要:

Ultrasound guidance is an accurate method for the delivery of therapeutic injections in the musculoskeletal system. The visualization of the needle in real time allows for reliable placement of the needle tip in the tendon sheath, bursa, or joint of interest. Both superficial and deep articulations and tendon sheaths can be targeted for diagnostic or therapeutic interventions. In addition, intratendinous calcifications, the plantar fascia, and interdigital (Morton's) neuromas can also be visualized and injected directly under real-time guidance. Performing percutaneous interventions with ultrasound ensures accurate needle tip placement and helps direct the needle away from other regional soft-tissue structures such as nearby neurovascular bundles.

ISSN:0894-8771    

出版商:OVID    

年代:2003

数据来源: OVID

摘要:

The biologic, behavioral, and pathologic features of low-malignant-potential (LMP) tumor of the ovary are distinct from their invasive counterpart. LMP tumors affect patients at a younger age and have a much better 5- and 20-year survival rate compared with invasive ovarian malignancy. The authors retrospectively reviewed the records and sonograms of 41 patients (51 masses) with LMP tumor of the ovary. They demonstrated a wide variety of morphologies on the presentation sonograms with six masses favored to be benign, four indeterminate, 18 likely malignant, and 23 clearly malignant. Eighteen of 51 masses (35.3%) had a unique appearance—a cyst within the ovary of small to medium size with vascular mural nodularity and preserved surrounding ovarian parenchyma. Low-level echoes within the cystic components of the mass, reminiscent of typical endometrioma, were present in 19 of 51 masses (37.2%). Peritoneal dissemination was present in six patients at presentation, all whom were alive at follow-up between 45 and 120 months. The authors think that many LMP tumors may be recognized and treated while they are still small. Ovary-sparing surgery may preserve patient fertility. LMP tumors may present initially with a benign morphology, although temporal evolution tends to show more suspicious features. Because these tumors may also appear frankly malignant or show peritoneal dissemination, the possibility of LMP tumor must be considered in light of their much better prognosis compared with invasive ovarian malignancy.

ISSN:0894-8771    

出版商:OVID    

年代:2003

数据来源: OVID

摘要:

This article is a review of the research on ultrasound contrast agents in general imaging. While general imaging contrast agent applications are still undergoing investigation and waiting FDA approval in the United States, they are approved for clinical use in Europe and other countries. The contrast microbubble properties are described, including their nonlinear behavior and destruction properties. Imaging techniques like harmonic imaging, pulse inversion, power pulse inversion, agent detection imaging, microvascular imaging, and flash contrast imaging are explained. A connection is made between the aforementioned imaging techniques and the different contrast agents available. The blood flow appearance of different liver tumors in the presence of contrast agents is demonstrated with examples.

ISSN:0894-8771    

出版商:OVID    

年代:2003

数据来源: OVID

摘要:

This is a case of a newborn with a rare testicular tumor—a juvenile granulosal cell tumor. This is a tumor of stromal origin, which is similar histologically to granulosal cell tumors of the ovaries. The authors present the imaging characteristics and differential diagnoses in this patient.

ISSN:0894-8771    

出版商:OVID    

年代:2003

数据来源: OVID

ISSN:0894-8771    

出版商:OVID    

年代:2003

数据来源: OVID

ISSN:0894-8771    

出版商:OVID    

年代:2003

数据来源: OVID

ISSN:0894-8771    

出版商:OVID    

年代:2003

数据来源: OVID

ISSN:0894-8771    

出版商:OVID    

年代:2003

数据来源: OVID

ISSN:0894-8771    

出版商:OVID    

年代:2003

数据来源: OVID