[A Case of renal Lymphangiectasia with a Follow-Up Duration of Twelve Years].

Renal lymphangiectasia is a rare disorder of renal lymphatics, which is not well-known in terms of its natural history. A 54-year-old woman without any symptoms was referred to our department for huge cystic lesions surrounding bilateral kidneys. Imaging examinations with ultrasonography, and computed tomography suggested renal lymphangiectasia of bilateral kidneys.

Pretreatment Mean Apparent Diffusion Coefficient Is Significantly Correlated With Event-Free Survival in Patients With International Federation of Gynecology and Obstetrics Stage Ib to IIIb Cervical Cancer.

Objectives: To assess the prognostic impact of the pretreatment mean apparent diffusion coefficient (ADCmean) values of tumors obtained by diffusion-weighted magnetic resonance imaging. We evaluated the prognostic value of the ADCmean for event-free survival (EFS) and overall survival (OS) among patients with uterine cervical cancer.

Methods/materials: We included 171 patients diagnosed as having International Federation of Gynecology and Obstetrics stage Ib to IIIb cervical cancer by pretreatment magnetic resonance imaging scans, regardless of therapeutic methods.

Magnetic resonance imaging manifestations of decidualized endometriotic cysts: comparative study with ovarian cancers associated with endometriotic cysts.

Purpose: The purpose of the study was to investigate the magnetic resonance imaging findings of decidualized endometriotic cysts in comparison with endometriotic cysts associated with ovarian cancers.

Methods: Eighteen decidualized endometriotic cysts and 24 ovarian cancers were retrospectively assessed on height, signal intensity of the solid component on T2- and diffusion-weighted imaging, apparent diffusion coefficient value of the solid component, size of the lesion, and signal intensity of the intracystic fluid on T1-weighted imaging.

Results: The heights of the solid components in the decidualized endometriotic cysts were inferior to 11.

The clinical utility of reduced-distortion readout-segmented echo-planar imaging in the head and neck region: initial experience.

Objectives: To evaluate whether readout-segmented echo-planar imaging (RS-EPI) diffusion weighted image (DWI) can diminish image distortion in the head and neck area, compared with single-shot (SS)-EPI DWI.

Methods: We conducted phantom and patient studies using 3 T magnetic resonance imaging (MRI) with a 16-channel coil. For the phantom study, we evaluated distortion and signal homogeneity in gel phantoms.

Changes of the normal ovary during menstrual cycle in reproductive age on the diffusion-weighted image.

Objective: The objective of this study was to investigate changes in magnetic resonance findings of the normal ovary during menstrual cycle on diffusion-weighted image (DWI).

Methods: Magnetic resonance imaging was performed in 9 healthy females at the menstrual, periovulatory, and luteal phases using a 1.5-T unit.

BLADE acquisition method improves T2-weighted MR images of the female pelvis compared with a standard fast spin-echo sequence.

Purpose: To investigate feasibility of the periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER or BLADE) T2-weighted imaging (T2WI) of the female pelvis by comparing it with standard fast spin-echo T2WI (STD-T2WI).

Materials And Methods: Sagittal STD-T2WI and BLADE-T2WI of the female pelvis were performed with (36 patients) or without (15 patients) administration of butylscopolamine on a 1.5 T MR unit.

Diffusion tensor MRI of the kidney at 3.0 and 1.5 Tesla.

Background: Diffusion tensor imaging (DTI) at 3 T provides information on the microstructure and pathophysiology of tissues that is not available from conventional imaging with an advantage of high signal to noise ratio (SNR).

Purpose: To evaluate the feasibility of DTI of the normal kidney at 3.0 T compared to results obtained at 1.

Diffusion tensor imaging of kidneys with respiratory triggering: optimization of parameters to demonstrate anisotropic structures on fraction anisotropy maps.

Purpose: To demonstrate the feasibility of diffusion tensor imaging (DTI) of kidneys with respiratory triggering, and determine the optimal imaging parameters for fraction anisotropy (FA) maps.

Materials And Methods: DTI of kidneys from 16 healthy volunteers was performed using a 1.5T scanner.

A case of Sertoli-Leydig cell tumour of the ovary with a multilocular cystic appearance on CT and MR imaging.

We present a case of Sertoli-Leydig cell tumour of the ovary in a 14-year-old girl who presented with abdominal distension. Ultrasonography showed a multilocular cystic lesion filled with finely echogenic fluid. Contrast-enhanced CT demonstrated a huge multilocular cystic mass with thickened septa.

MR imaging of the female pelvis at 3 Tesla: evaluation of image homogeneity using different dielectric pads.

Purpose: To evaluate improvements in image homogeneity in pelvic MR imaging at 3 Tesla (T) using two different dielectric pads.

Materials And Methods: A total of eight healthy females were scanned using a 3T MR scanner equipped with a body-array coil. Axial and sagittal fast spin-echo T2-weighted images (T2WI) (TR/TE = 3200 msec/94 msec), axial fast spin-echo T1-weighted images (T1WI) (TR/TE = 700 msec/11 msec), and sagittal half-Fourier acquisition single-shot turbo spin-echo (HASTE) images (TR/TE = 3000 msec/100 msec) were performed for pelvic imaging.

The utility of diffusion-weighted MR imaging for differentiating uterine sarcomas from benign leiomyomas.

The usefulness of diffusion-weighted (DW) magnetic resonance (MR) imaging for the diagnosis of uterine sarcomas was investigated, as well as whether DW images and quantitative measurement of apparent diffusion coefficient (ADC) values can facilitate differentiating uterine sarcomas from benign leiomyomas. MR images including DW images were obtained in 43 surgically treated patients with 58 myometrial tumors, including seven uterine sarcomas (five leiomyosarcomas and two endometrial stromal sarcomas) and 51 benign leiomyomas (43 ordinary leiomyomas, two cellular leiomyomas and six degenerated leiomyomas). Qualitative analysis of non-enhanced and postcontrast MR images and DW images and quantitative measurement of ADC values were performed for each myometrial tumor.

MRI of the female pelvis at 3T compared to 1.5T: evaluation on high-resolution T2-weighted and HASTE images.

Purpose: To evaluate the feasibility of MRI of the female pelvis using high-resolution T2-weighted imaging (T2WI) and the half-Fourier acquisition single-shot turbo spin-echo (HASTE) technique at 3 Tesla (T) compared to 1.5T, while focusing on the uterine body and cervical anatomy.

Materials And Methods: A total of 19 healthy women underwent pelvic MR scans on 3T and 1.

MR imaging findings of adenomyosis: correlation with histopathologic features and diagnostic pitfalls.

Adenomyosis is a nonneoplastic condition, characterized by benign invasion of ectopic endometrium into the myometrium with hyperplasia of adjacent smooth muscle. The common symptoms include dysmenorrhea, menorrhagia, and abnormal uterine bleeding, but these do not allow diagnosis. Therefore, imaging plays an important role because establishment of the correct preoperative diagnosis is critical to avoid unnecessary intervention.