Advertisement
Advertise here Publish your press releases here Sponsor BioPortfolio
Follow us on Twitter Sign up for daily news and research emails Contributors wanted

Theoretical performance analysis for CMOS based high resolution detectors.

01:20 EDT 31st July 2014 | BioPortfolio

Summary of "Theoretical performance analysis for CMOS based high resolution detectors."

High resolution imaging capabilities are essential for accurately guiding successful endovascular interventional procedures. Present x-ray imaging detectors are not always adequate due to their inherent limitations. The newly-developed high-resolution micro-angiographic fluoroscope (MAF-CCD) detector has demonstrated excellent clinical image quality; however, further improvement in performance and physical design may be possible using CMOS sensors. We have thus calculated the theoretical performance of two proposed CMOS detectors which may be used as a successor to the MAF. The proposed detectors have a 300 μm thick HL-type CsI phosphor, a 50 μm-pixel CMOS sensor with and without a variable gain light image intensifier (LII), and are designated MAF-CMOS-LII and MAF-CMOS, respectively. For the performance evaluation, linear cascade modeling was used. The detector imaging chains were divided into individual stages characterized by one of the basic processes (quantum gain, binomial selection, stochastic and deterministic blurring, additive noise). Ranges of readout noise and exposure were used to calculate the detectors' MTF and DQE. The MAF-CMOS showed slightly better MTF than the MAF-CMOS-LII, but the MAF-CMOS-LII showed far better DQE, especially for lower exposures. The proposed detectors can have improved MTF and DQE compared with the present high resolution MAF detector. The performance of the MAF-CMOS is excellent for the angiography exposure range; however it is limited at fluoroscopic levels due to additive instrumentation noise. The MAF-CMOS-LII, having the advantage of the variable LII gain, can overcome the noise limitation and hence may perform exceptionally for the full range of required exposures; however, it is more complex and hence more expensive.

Affiliation

Journal Details

This article was published in the following journal.

Name: Proceedings - Society of Photo-Optical Instrumentation Engineers
ISSN: 1018-4732
Pages:

Links

PubMed Articles [44232 Associated PubMed Articles listed on BioPortfolio]

High spectral and spatial resolution X-ray transmission radiography and tomography using a Color X-ray Camera.

High resolution X-ray radiography and computed tomography are excellent techniques for non-destructive characterization of an object under investigation at a spatial resolution in the micrometer range...

Flexible, Low-Voltage and High-Performance Polymer Thin-Film Transistors and Their Application in Photo/Thermal Detectors.

Flexible, low-voltage electronic devices with a good response to light and temperature are constructed from newly realized high-performance polymer thin-film transistors (PTFTs) based on diketopyrrolo...

A Two-Step A/D Conversion and Column Self-Calibration Technique for Low Noise CMOS Image Sensors.

In this paper, a 120 frames per second (fps) low noise CMOS Image Sensor (CIS) based on a Two-Step Single Slope ADC (TS SS ADC) and column self-calibration technique is proposed. The TS SS ADC is suit...

A novel ToF-SIMS operation mode for sub 100 nm lateral resolution: Application and performance.

A novel operation mode for time of flight-secondary ion mass spectrometry (ToF-SIMS) is described for a TOF.SIMS 5 instrument with a Bi-ion gun. It features sub 100 nm lateral resolution, adjustable...

Hybrid pixel-waveform CdTe/CZT detector for use in an ultrahigh resolution MRI compatible SPECT system.

In this paper, we will present a new small pixel CdTe/CZT detector for sub-500 μm resolution SPECT imaging application inside MR scanner based on a recently developed hybrid pixel-waveform (HPWF) rea...

Clinical Trials [4851 Associated Clinical Trials listed on BioPortfolio]

Localizing the Epileptogenic Zone With High Resolution Electroencephalography in Presurgical Evaluation of Partial Epilepsies

Multicenter prospective study comparing the diagnosis value of high-resolution EEG and depth-EEG to localize the epileptogenic zone in drug resistant partial epilepsies.

MRI Imaging of the Human Larynx

To determine if high resolution MRI can detect early invasion of cartilage by laryngeal carcinoma, and to determine if high resolution MRI may be superior to conventional MRI imaging or CT...

Study of Latent Tuberculosis Infection (LTBI) by High Resolution Scanner

It is traditionally considered that someone with a positive tuberculin skin test (TST) (and/or positive result in Cell Interferon-Gamma Release Assay (TIGRA), depending on the different co...

High-Field MRI Characterization of Wrist and Hand Cartilage Abnormalities in Inflammatory and Chronic Rheumatisms

The present project aims at evaluating the diagnostic potential of high-field MRI (3 Teslas) for joint disease. At this field, given that isotropic image resolution of 400 microns can be o...

Using High Resolution Function Imaging To Detect Melanoma and Dysplastic Nevi

A novel infrared imaging tool to aid in the clinical detection of atypical pigmented lesions and melanoma is developed. Goals include evaluation of the utility of high-resolution infrared...

Medical and Biotech [MESH] Definitions

A method of chemical analysis based on the detection of characteristic radionuclides following a nuclear bombardment. It is also known as radioactivity analysis. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

The identification, analysis, and resolution of moral problems that arise in the care of patients. (Bioethics Thesaurus)

A performance test based on forced MOTOR ACTIVITY on a rotating rod, usually by a rodent. Parameters include the riding time (seconds) or endurance. Test is used to evaluate balance and coordination of the subjects, particular in experimental animal models for neurological disorders and drug effects.

Analysis based on the mathematical function first formulated by Jean-Baptiste-Joseph Fourier in 1807. The function, known as the Fourier transform, describes the sinusoidal pattern of any fluctuating pattern in the physical world in terms of its amplitude and its phase. It has broad applications in biomedicine, e.g., analysis of the x-ray crystallography data pivotal in identifying the double helical nature of DNA and in analysis of other molecules, including viruses, and the modified back-projection algorithm universally used in computerized tomography imaging, etc. (From Segen, The Dictionary of Modern Medicine, 1992)

Theoretical representations that simulate the behavior or activity of systems, processes, or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.

Search BioPortfolio:
Advertisement
Advertisement

Searches Linking to this Article