出版者・発行元：学研メディカル秀潤社  

DOI： 10.15105/gz.0000000981

CiNii Research

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s12328-018-0895-8

Web of Science

PubMed

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1177/2058460118769687

Web of Science

PubMed

記述言語：日本語   出版者・発行元：日本腹部救急医学会  

<p>症例は72歳，女性。近医より後腹膜大量出血による出血性ショックの状態で転院搬送された。緊急血管造影検査で下膵十二指腸動脈からの持続的な出血を認め，塞栓術を施行しすみやかに循環動態は安定した。塞栓術後腹部コンパートメント症候群（abdominal compartment syndrome：以下，ACS） を発症したため緊急開腹血腫除去術を行い，全身状態は改善した。動脈性の大量出血による出血性ショックに対して，血管塞栓術は低侵襲で迅速に止血が得られるため効果的な治療法である。一方，大量の血腫が後腹膜または腹腔内に残存しACS発症のリスクが高いため，大量出血に対する塞栓術後にはACSを念頭に置き，診療にあたることが重要である。</p>

DOI： 10.11231/jaem.38.105

CiNii Research

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Web of Science

出版者・発行元：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

記述言語：英語   出版者・発行元：日本磁気共鳴医学会  

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. 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. 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). 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.

DOI： 10.2463/mrms.9.49

Web of Science

Scopus

PubMed

CiNii Research

記述言語：日本語  

CiNii Research

記述言語：日本語   出版者・発行元：日本胆道学会  

<b>要旨: </b>十二指腸乳頭部近傍領域のCT診断においては1.25 mm以下の検出器厚による多相造影検査と2-3 mm厚の水平断と高分解能のmultiplanar reformatted imagesの作成が重要である．これらの画像は，主膵管，膵内胆管，膵頭十二指腸動脈などの細かな解剖学的構造の描出を可能とする．また，膵実質相において膵頭部と十二指腸の間に造影効果の低下した領域が描出され，この領域は膵胆管をOddi括約筋が取り巻いている領域に相当すると推定される．膵胆管拡張の原因検索のためCT検査が施行された乳頭部腫瘍の症例において，CTの果たすべき最も重要な役割は膵癌や胆管癌などの他の疾患を除外することである．しかしながら，CTは共通管，Oddi括約筋，十二指腸固有筋層を分離して同定できないため，局所進展度診断におけるその役割は限られる．乳頭部腫瘍は比較的予後が良好であるため，CT検査の施行においては，その被曝や造影剤に伴う副作用にも十分留意すべきである．<br>

DOI： 10.11210/tando.23.806

CiNii Research

記述言語：英語   出版者・発行元：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

記述言語：英語   出版者・発行元：日本磁気共鳴医学会  

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 contrastto-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 (P<0.01). The CNRs for lesion-to-GM and lesion-to-WM were significantly higher on SPACE images than on MP-RAGE images (P<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.

DOI： 10.2463/mrms.7.13

Scopus

PubMed

CiNii Research

記述言語：日本語   出版者・発行元：一般社団法人 日本生物物理学会  

DOI： 10.2142/biophys.40.s14_1

CiNii Research