Publications by authors named "Yukiko Usui"
Ectopic pituitary neuroendocrine tumors (PitNETs) are uncommon conditions that develop outside of the sella turcica. The sphenoid sinus is the most common site for ectopic PitNET, followed by the suprasellar region, clivus, and cavernous sinus. PitNETs, regardless of whether inside or outside sella, may display avid 18F-fluorodeoxyglucose (FDG) uptake and masquerade as malignant tumors.
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- * Sixteen CT images were analyzed by two radiologists who scored eight anatomical structures, comparing visual assessments across different reconstruction modes.
- * Higher spatial resolution and lower noise reduction led to better visual scores, particularly for specific structures like the stapedius muscle, while showing a negative correlation with contrast-to-noise ratio.
This study aimed to evaluate the visualization of peripheral bronchioles in normal lungs via quarter-detector computed tomography (QDCT). Visualization of bronchioles within 10 mm from the pleura is considered a sign of bronchiectasis. However, it is not known peripheral bronchioles how close to the pleura in normal lungs can be tracked using QDCT.
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- A 73-year-old man was diagnosed with ureteral squamous metaplasia, accompanied by a tumor measuring 2.5 cm in his ureter.
- Preoperative imaging indicated that the tumor could either be a submucous mesodermal tumor or an inverted papillary transitional cell carcinoma.
- As a result, a retroperitoneal laparoscopic left nephroureterectomy procedure was carried out to remove the affected area.