Sentences with word «photoacoustic»

The next step, he added, is to prove the applicability of photoacoustic imaging in tumor models and ultimately in patients.

Their goal is to explore the feasibility of photoacoustic imaging for the diagnosis of cervical cancer, he added.

Yang and her group are exploring the use of the exceptional point in photoacoustic imaging studies and other scenarios where they seek development of «unconventional light transport modes,» she said.

Photoacoustic spectrometer for measuring light absorption by aerosol: Instrument description

Through the development of a technique called photoacoustic tomography, Wang was able to conquer this limit and advance the imaging depth by nearly two orders of magnitude, from one millimeter to several centimeters, an improvement that could enable doctors to acquire high - resolution images through a patient's skin using light.

The researchers developed an oxygen - sensitive molecular beacon that emits ultrasound signals in response to light, a process called photoacoustic imaging — a less invasive, higher resolution and less costly method than the current clinical standard, which uses radioactive molecules and positron emission tomography scans.

Chan's group is exploring other types of photoacoustic molecules that could image other conditions.

The paper is titled «Motionless volumetric photoacoustic microscopy with spatially invariant resolution.»

Absorption at San Antonio with 3 - Wavelength Photoacoustic Soot Spectrometer, Tricolor Absorption Photometer (ASAPT) Field Campaign Report.

The generated waves are then detected by an ultrasonic sensor to form photoacoustic images of the tissues.

In this paper, the researchers describe how they examined 30 cervical tissue samples with photoacoustic imaging.

Real - time, contrast enhanced photoacoustic imaging of cancer in a mouse window chamber.

He was also the recipient of the Purdue College of Engineering's «Outstanding Dissertation Award» for his research on photoacoustic characterization of carbon nanotube array thermal interfaces.

Photoacoustic Studies of Colloidal Silica Particles after MeV Ion - Induced Shape Deformation

Now a team of researchers from Central South University in China have demonstrated that a technique known as photoacoustic imaging, which is already under investigation for detecting skin or breast cancers and for monitoring therapy, also has the potential to be a new, faster, cheaper and non-invasive method to detect, diagnose and stage cervical cancer with high accuracy.

In each experiment, researchers embedded one piece of normal cervical tissue and one piece of cervical lesion from the same person in a cylindrical phantom for simultaneous photoacoustic imaging.

«Our ultimate goal is to develop an endoscopic photoacoustic imaging probe scanning the cervical canal, which would be a quicker, cheaper and non-invasive method for the diagnosis of cervical cancer,» Xiao said.

Where ultrasound offers images of structures, photoacoustics generates images that contain more functional information, such as where blood is located.

Several years ago, researchers from the University of Twente joined forces with a number of companies to develop a prototype for a machine that would combine ultrasound and photoacoustics medical imaging techniques.

By tracking the movement of these hot spots (shown in yellow above) using photoacoustic imaging, the team could calculate the flow rate of the blood, even when it moved slowly through small vessels like capillaries.

In a paper published in the October 3 issue of Nature Communications, they describe a modified form of the technology they're calling spatially invariant resolution photoacoustic microscopy, or SIR - PAM.

The technology, called 3 - D photoacoustic microscopy (PAM), bombards tissue with a laser beam.

In Vivo Intravascular Photoacoustic Tomography for Depth - Resolved Lipid - Rich Plaque Assessment

The team that included Gary Baker, an assistant professor of chemistry in the MU College of Arts and Science and Gerardo Gutierrez - Juarez, a professor and investigator at the University of Guanajuato in Mexico, decided to supplement an emerging technique called photoacoustic (PA) spectroscopy, a specialized optical technique that is used to probe tissues and cells non-invasively.

Additionally in photoacoustic imaging, a novel imaging technology [26], the signal is generated from the absorbed energy that is not radiated in the form of fluorescence.

Photoacoustic tomography of a nanoshell contrast agent in the in vivo rat brain.

The study entitled «Feasibility of photoacoustic / ultrasound imaging of synovitis in finger joints using a point - of - care system» was conducted and published by Pim van den Berg, Khalid Daoudi and Wiendelt Steenbergen from the University of Twente research institute MIRA in cooperation with rheumatologist Hein Moens of Ziekenhuis group Twente.

As a consequence, high molar excitation coefficient (EC) and low quantum efficiency (QE) yield higher signal to noise ratios and is an advantage in photoacoustic imaging.

The carbon nanotubes absorb pulsed laser light, and this absorption leads to an ultrasound wave via the photoacoustic effect.

According to Xiao, photoacoustic imaging (PAI) is a hybrid optical imaging technique that combines the high optical contrast of pure optical imaging with the high spatial resolution and the deep imaging depth of ultrasound.

By processing all of the photoacoustic imaging data with computer programs, scientists obtain a 2 - D en - face photoacoustic image called a depth maximum amplitude projection (DMAP) image, which shows the optical absorption distribution or photoacoustic contrast of the sample.

While the work is preliminary, it provides solid experimental basis for future studies, showing for the first time that photoacoustic imaging has the potential to make better diagnoses and help save lives, Xiao said.

In photoacoustic imaging, short laser pulses are employed to irradiate biological tissues.

By using hemoglobin as the contrast agent or indicator, photoacoustic imaging is highly sensitive to abnormal angiogenesis, the abnormal formation of new blood vessels, which is a hallmark of the cancer tumors.

«Our results show that the photoacoustic imaging may have great potential in the clinical diagnosis of cervical cancer,» said Jiaying Xiao, an assistant professor of biomedical engineering at Central South University, who led the research.

Compared with other cervical screening methods, Xiao added, photoacoustic imaging also has a much higher penetration depth by using ultrasound as the localizing signal, which is less scattered than light.

The photoacoustic imaging can also evaluate the invasion depth of cervical lesions more effectively.»

Using ultrasound detectors, researchers can map these photoacoustic signals and identify the locations of lesions.

To date, photoacoustic imaging has been employed for the diagnosis of various cancers with different scanning configurations, Xiao said.

They found that photoacoustic imaging could distinguish the cancerous from the normal tissue and had the potential to evaluate the stage of the cancer.

Ultrasound technology and photoacoustics are two medical imaging techniques that complement each other well.

In photoacoustics, short laser pulses are emitted into a patient's body.

The researchers found that their photoacoustic method could find hypoxia mere minutes after a mouse's artery was constricted, showing promise for quickly finding stroke sites or blood clots in deep tissue.

Photoacoustic imaging picks out blood vessels better, but it can't see flow in a continuous stream.

The second technique, photoacoustic imaging, uses an infrared laser that, when absorbed by blood, heats it.

Physicians would administer the photoacoustic molecules to the patient, either by injecting into a vein or directly to a tumor site, then use the modified ultrasound machine to visualize the area of interest.