Publisher：学研メディカル秀潤社  

DOI： 10.15105/gz.0000000981

CiNii Research

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s12328-018-0895-8

Web of Science

PubMed

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1177/2058460118769687

Web of Science

PubMed

Language：Japanese   Publisher：Japanese Society for Abdominal Emergency Medicine  

<p>We report hereon on a rare case of a 72-year-old female with abdominal compartment syndrome (ACS) following embolization for massive bleeding from the inferior pancreaticoduodenal artery who was saved by open abdominal surgery. She came to our hospital by ambulance diagnosed as having massive bleeding from the retroperitoneal vasculature and she was in a state of severe hemorrhagic shock. Angiography revealed that the extravasation was from the inferior pancreaticoduodenal artery and we performed embolization of the artery. After the embolization, she had ACS and we quickly performed open abdominal surgery to remove a large hematoma from her abdomen. After the operation, she recovered. As we can stop bleeding quickly, embolization is an effective treatment for arterial hemorrhage shock. On the other hand there is so a big risk for the occurrence of ACS, as a large amount of hematoma could be left in the abdomen. It is important that we recognize the risk for ACS after embolization for massive bleeding.</p>

DOI： 10.11231/jaem.38.105

CiNii Research

Language：English   Publishing type：Research paper (scientific journal)  

Web of Science

Publisher：Progress in Biomedical Optics and Imaging - Proceedings of SPIE  

Optical coherence tomography (OCT) is an emerging technology for non-invasive cross-sectional imaging of biological tissue and material with um resolution. Recently, non-invasive high resolution cross-sectional imaging is desired for investigation of diseases in lung in the field of pulmonary medicine. So far, a few works have been reported about OCT imaging of lung. Since the lung consists of alveoli separated by thin wall, ultrahigh resolution (UHR) OCT is supposed to be effective for the imaging of fine structure in lung tissue. In this work, ex vivo cross-sectional imaging of isolated rat lungs was demonstrated using UHR-OCT. A 120 nm-wide, high-power, Gaussian-like supercontinuum (SC) was generated at wavelength of 0.8 um region and it was used as the light source in time domain UHR-OCT. An ultrahigh resolution of 2.1 um in tissue was obtained and the achieved sensitivity was 105 dB. For the UHR-OCT imaging of trachea, the detailed structures of the tracheal cartilage and tracheal mucosa overlying the cartilage were observed clearly. The epithelium and lamina propria were also distinguishable. For the imaging of visceral pleura and alveoli, when saline was instilled into the lung, the penetration depth was improved, and clear images of the fine structure of the lung, including alveoli, were observed owing to the index matching effect. The clear images of up to about 4 alveoli were observed below the visceral pleura. The shape of the alveolar septum was clearly observed, and the alveolar sac was clearly visible. © 2011 SPIE.

DOI： 10.1117/12.878874

Web of Science

Scopus

Language：English   Publisher：Japanese Society for Magnetic Resonance in Medicine  

Purpose: We assessed the value of adding a breath-hold, black-blood, fluid-attenuated, inversion recovery (BH-BB-FLAIR) sequence with a small motion-probing gradient (b=10 s/mm²) using superparamagnetic iron oxide (SPIO) to our present studies that utilize SPIO to detect hepatocellular carcinoma (HCC). We used inversion recovery (IR) in a FLAIR sequence to suppress signals from cysts and a low b-value to suppress vessel signals and provide higher signal to noise than that using high b-value diffusion-weighted imaging. Use of SPIO is expected to reduce the signal in both normal liver parenchyma and in most benign lesions.<br> Materials and Methods: In 19 patients, we reviewed 38 HCC nodules diagnosed by CT arterioportography (CTAP) and CT during hepatic arteriography (CTHA). We divided SPIO-mediated images into sets, those obtained with and without BH-BB-FLAIR. Six radiologists individually interpreted the 2 image sets and sorted them by their confidence levels for the presence of HCC, and we calculated the area under the receiver operating characteristic (ROC) curve (Az) for each image set.<br> Results: On images obtained with BH-BB-FLAIR after SPIO administration, 33 of the 38 HCC nodules appeared as areas of high signal and cyst signal was extinguished. The ROC analysis showed significantly higher Az values in the set with BH-BB-FLAIR (0.89) than in the set without (0.83).<br> Conclusions: Adding BH-BB-FLAIR to existing SPIO-mediated imaging protocols improved detection of HCC nodules and added only 24 s to the scan time.<br>

DOI： 10.2463/mrms.9.49

Web of Science

Scopus

PubMed

CiNii Research

Language：Japanese  

CiNii Research

Language：Japanese   Publisher：Japan Biliary Association  

For CT diagnosis of the periampullary region, it is essential to perform multiphase contrast-enhanced examinations with collimation of 1.25 mm or less and reconstruct axial images as well as high-resolution multiplanar reformatted images with a 2-3-mm slice thickness. These images make it possible to depict small anatomic structures such as the pancreatic and intrapancreatic bile ducts and pancreaticoduodenal arterial arcade. Furthermore, the examinations permit the visualization of the area showing less contrast enhancement between the pancreatic head and duodenum in pancreatic-phase images, what is assumed to correspond to the area of the ducts surrounded by the sphincter of Oddi. In the patients with ampullary neoplasms presenting with dilatation of the pancreatic and/or bile ducts, the most valuable role required for CT is to determine the absence of other disorders such as pancreatic cancer and bile duct cancer. However, since it is impossible to identify the common channel, the muscularis propria of the duodenal wall, and the sphincter of Oddi on CT, the role in local staging of ampullary tumor is limited. Since ampullary tumors have a relatively good prognosis, it is also required to pay enough attention to side effects associated with radiation exposure and contrast media in CT examinations.<br>

DOI： 10.11210/tando.23.806

CiNii Research

Language：English   Publisher：CardioVascular and Interventional Radiology  

The purpose of this study was to assess the efficacy of transcatheter arterial embolization for ruptured pancreaticoduodenal artery (PDA) aneurysms associated with celiac axis stenosis (CS). Seven patients (four men and three women; mean age, 64; range, 43-84) were treated with transcatheter arterial embolization between 2002 and 2007. They were analyzed with regard to the clinical presentation, radiological finding, procedure, and outcome. All patients presented with sudden epigastric pain or abdominal discomfort. Contrast-enhanced CT showed a small aneurysm and retroperitoneal hematoma around the pancreatic head in all patients. The aneurysms ranged from 0.3 to 0.9 cm in size. In one patient, two aneurysms were detected. The aneurysms were located in the pancreaticoduodenal artery (n = 5) and the dorsal pancreatic artery (n = 3). Embolization was performed with microcoils in all aneurysms (n = 8). N-Butyl 2-cyanoacrylate (n = 1) and gelatine particle (n = 1) were also used. Complete occlusion was achieved in four patients. In the other three patients, a significantly reduced flow to the aneurysm remained at final angiography. However, these aneurysms were thrombosed on follow-up CT within 2 weeks. And there was no recurrence of the symptoms and bleeding during follow-up (mean, 28 months; range, 5-65 months) in all patients. In conclusion, transcatheter arterial embolization for PDA aneurysms associated with CS is effective. Significant reduction of the flow to the aneurysm at final angiography may be predictive of future thrombosis. © 2008 Springer Science+Business Media, LLC.

DOI： 10.1007/s00270-008-9343-3

Web of Science

Scopus

PubMed

Language：English   Publisher：Japanese Society for Magnetic Resonance in Medicine  

We evaluated the newly developed whole-brain, isotropic, 3-dimensional turbo spin-echo imaging with variable flip angle echo train (SPACE) for contrast-enhanced T₁-weighted imaging in detecting brain metastases at 3 tesla (T). Twenty-two patients with suspected brain metastases underwent postcontrast study with SPACE, magnetization-prepared rapid gradient-echo (MP-RAGE), and 2-dimensional T₁-weighted spin echo (2D-SE) imaging at 3T. We quantitatively compared SPACE, MP-RAGE, and 2D-SE images by using signal-to-noise ratios (SNRs) for gray matter (GM) and white matter (WM) and contrast-to-noise ratios (CNRs) for GM-to-WM, lesion-to-GM, and lesion-to-WM. Two blinded radiologists evaluated the detection of brain metastases by segment-by-segment analysis and continuously-distributed test. The CNR between GM and WM was significantly higher on MP-RAGE images than on SPACE images (<i>P</i><0.01). The CNRs for lesion-to-GM and lesion-to-WM were significantly higher on SPACE images than on MP-RAGE images (<i>P</i><0.01). There was no significant difference in each sequence in detection of brain metastases by segment-by-segment analysis and the continuously-distributed test. However, in some cases, the lesions were easier to detect in SPACE images than in other sequences, and also the vascular signals, which sometimes mimic lesions in MP-RAGE and 2D-SE images, were suppressed in SPACE images. In detection of brain metastases at 3T magnetic resonance (MR) imaging, SPACE imaging may provide an effective, alternative approach to MP-RAGE imaging for 3D T₁-weighted imaging.<br>

DOI： 10.2463/mrms.7.13

Scopus

PubMed

CiNii Research

Language：Japanese   Publisher：The Biophysical Society of Japan General Incorporated Association  

DOI： 10.2142/biophys.40.s14_1

CiNii Research