Qualitative near-infrared vascular imaging system with tuned aperture computed tomography

Matsushita, Teruo; Miyati, Tosiaki; Nakayama, Keiichi I.; Hamaguchi, Takashi; Yuki, Hideaki; Farman, Allan G.; Ohtake, Shigeki

doi:10.1117/1.3595424

Cited by 7 publications

(3 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The challenge of using NIR is penetration depth; low-quality images are generated for deep veins. 20 We consider that our investigated veins were deep and, therefore, difficult to visualize with AccuVein. In this study, we did not detect a significant difference in the depth of the veins visualized by the two devices.…”

Section: Discussionmentioning

confidence: 99%

An observational study comparing the prototype device with the existing device for the effective visualization of invisible veins in elderly patients in Japan

et al. 2015

Self Cite

View full text Add to dashboard Cite

Objective:To compare the performance on the detection of the invisible veins between our modified prototype device and an existing device in elderly hospitalized patients.Methods:A prospective, cross-sectional, and observational study was performed in the invisible veins in elderly patients. The major variables, skin color near the invisible veins, and diameter and depth of the invisible veins were measured. The vein visualization rate was calculated as the ratio of the visualized veins to the invisible veins by the visualization device.Results:We analyzed 53 invisible veins in the cubital fossa and 56 invisible veins in the forearm in a total of 72 patients (median age, 73 years). The visualization rate for our prototype device was higher than that for an existing device in the cubital fossa and the forearm sites. The visualized veins of the prototype device had a higher intensity ratio than that of an existing device. No significant differences were observed in the body mass index, vein depth, and vein diameter of the visualized veins at the cubital fossa and forearm sites.Conclusion:The prototype surpassed the existing device in visualizing the invisible veins. However, the prototype was unable to visualize all the invisible veins. We need to look for ways to reduce noise and to visualize the invisible veins, and the visualization rate of devices needs to be investigated in further association with the percentage of success with actual intravenous access and locating time to vein.

show abstract

Section: Discussionmentioning

confidence: 99%

An observational study comparing the prototype device with the existing device for the effective visualization of invisible veins in elderly patients in Japan

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] These studies use only spatial information of the measured NIR images in order to improve detection and localization of blood vessels and estimate useful anatomical information clinically. However, there has been no study that has focused on extracting both the spatial and temporal features of dynamic NIR images obtained via non-contact near-infrared optical scanner (NIROS) without the use of external contrast agents.…”

Section: Introductionmentioning

confidence: 99%

Anatomical co-registration using spatio-temporal features of a non-contact near-infrared optical scanner

et al. 2014

View full text Add to dashboard Cite

Non-contact based near-infrared (NIR) optical imaging devices are developed for non-invasive imaging of deep tissues in various clinical applications. Most of these devices focus on obtaining the spatial information for anatomical co-registration of blood vessels as in sub-surface vein localization applications. In the current study, the anatomical co-registration of blood vessels based on spatio-temporal features was performed using NIR optical imaging without the use of external contrast agents. A 710 nm LED source and a compact CCD camera system were employed during simple cuff (0 to 60 mmHg) experiment in order to acquire the dynamic NIR data from the dorsum of a hand. The spatio-temporal features of dynamic NIR data were extracted from the cuff experimental study to localize vessel according to blood dynamics. The blood vessels shape is currently reconstructed from the dynamic data based on spatio-temporal features. Demonstrating the spatio-temporal feature of blood dynamic imaging using a portable non-contact NIR imaging device without external contrast agents is significant for applications such as peripheral vascular diseases.

show abstract

“…CCD or CMOS camera) for non-contact imaging. The various fiberfree non-contact NIR imagers available to date are provided in Table 1 [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. These imagers employ either reflectance or transmittance mode to image tissue phantoms, blood vessels, and/or veins of the skin surface.…”

Section: Introductionmentioning

confidence: 99%

Non-contact Deep Tissue Imaging using a Hand-Held Near-infrared Optical Scanner

Jung¹,

Roman²,

Carrasquilla³

et al. 2015

J Med Diagn Meth

View full text Add to dashboard Cite

Fiber-free non-contact near-infrared (NIR) imaging devices using wide-field detectors are emerging apart from the contact and fiber-based NIR devices. Unlike the fiber-based devices that can image deep tissues, the fiber-free noncontact devices have been used only for subsurface imaging (≤1 cm) to date. A new compact (7 × 8 × 12 cm 3) handheld Near-Infrared. Optical Scanner (NIROS) has been developed for fiber-free non-contact imaging of deep tissues in both reflectance and transmittance modes. Absorption-contrasted diffuse imaging studies were performed on tissue mimicking cubical phantoms (5.5 × 5.5 × 5.5 cm 3 volume) using India. Ink based targets located at various depths (0.5 to 4 cm) in both reflectance and transmittance modes. Preliminary in vivo breast imaging studies in transmittance mode were also performed to determine the deep target detectability of NIROS. The hand-held NIROS could detect targets up to 1.5 cm in reflectance mode and across the entire depth of the phantom (4 cm deep) in transmittance mode, as observed from phantom studies. Absorption-contrasted targets placed as deep as 6 cm were detectable in vivo breast tissues during transmittance imaging, when comfortable pressure was applied via compression. The non-contact hand-held NIROS demonstrated the ability to detect targets deeper than 1 cm (which was the limit attempted to date using other non-contact NIR devices in phantoms or in vivo). The ability of the portable handheld NIROS to perform deep tissue imaging can allow for in vivo breast imaging studies in the future, with a potential as an initial assessment tool for breast cancer pre-screening.

show abstract

Qualitative near-infrared vascular imaging system with tuned aperture computed tomography

Cited by 7 publications

References 23 publications

An observational study comparing the prototype device with the existing device for the effective visualization of invisible veins in elderly patients in Japan

An observational study comparing the prototype device with the existing device for the effective visualization of invisible veins in elderly patients in Japan

Anatomical co-registration using spatio-temporal features of a non-contact near-infrared optical scanner

Non-contact Deep Tissue Imaging using a Hand-Held Near-infrared Optical Scanner

Contact Info

Product

Resources

About