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S pectral D omain O ptical C oherence T omography ( SD-OCT )

S pectral D omain O ptical C oherence T omography ( SD-OCT ). Analicia Behnke November 27, 2012. SD-OCT. SD OCT screens for retinopathy of prematurity in babies eyes

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S pectral D omain O ptical C oherence T omography ( SD-OCT )

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  1. Spectral Domain Optical Coherence Tomography(SD-OCT) Analicia Behnke November 27, 2012

  2. SD-OCT • SD OCT screens for retinopathy of prematurity in babies eyes • Uses narrow beams of light to penetrate deep layers of tissue and produce a 3-D image of posterior section of an infants eye

  3. What is retinopathy of prematurity? • Eye disorder effecting premature infants • Weighing less than 2.75 pounds • Born earlier than 31 weeks • ROP is caused by abnormal growth of blood vessels in the retina, causing the retina to be pulled out of position and even become detached • Five stages, ranging from mild abnormal growth to detached cornea

  4. Cause of ROP • Abnormal growth happens because normal retinal development doesn’t complete until a few weeks after birth • Before blood vessels reach edge of retina, growth stops. • The edge of the retina doesn’t receive enough oxygen so it sends out signals to other areas of the retina for nourishment, resulting in abnormal growth of vessels. • New blood vessels are fragile and can break easily causing bleeding and scaring, which pulls on the retina when they shrink, causing a detached retina

  5. Testing for ROP • OCT- Optical Coherence Tomography • Reflects light to create 2D and 3D images of the eye • Used moving reference mirror to measure the time it took for light to be reflected • Lengthy process • Limited image quality • Usually tested about 4-6 weeks after birth • Eyelid speculum is used to keep the eyes open • Lens with a light will be used to look in the babies eyes • Use a scleral depressor to move the eye into different positions

  6. SD-OCT • Developed at Duke University • Measures multiple wavelengths of reflected light • 100 times faster • 40,000 pictures per second for clearer images • TruTack technology- Tracks eye movement during imaging • Detect changes during the scan

  7. Benefits • Hand-held probe allows the baby to stay in the incubator during testing • Allows for cross-sectional images of the retina, allowing for better visualization • Reduces time spent on diagnosis • Faster diagnosis, faster treatment, less damage to an infants vision

  8. Sources • "New Device To Detect Blindness In Babies | Biomedical Engineering & Biotechnology News." New Device To Detect Blindness In Babies | Biomedical Engineering & Biotechnology News. N.p., 16 Aug. 2012. Web. 17 Nov. 2012. <http://www.biomedicalblog.com/new-device-to-detect-blindness-in-babies/22000/>. • Facts About Retinopathy of Prematurity (ROP)." Facts About Retinopathy of Prematurity [NEI]. N.p., n.d. Web. 24 Nov. 2012. <http://www.nei.nih.gov/health/rop/rop.asp>. • "Eye Exam for Retinopathy of Prematurity by Alexandra Howson, PhD." Eye Exam for Retinopathy of Prematurity. Beth Israel Deaconess Medical Center, 2008. Web. 25 Nov. 2012. <http://www.bidmc.org/YourHealth/MedicalProcedures.aspx?ChunkID=588196>. • "Spectral-Domain Optical Coherence Tomography (SD-OCT)." Heidelbergengineeringcom RSS. Heidelberg Engineering, 2012. Web. 25 Nov. 2012. <http://www.heidelbergengineering.com/us/products/spectralis-models/technology/spectral-domain-oct/>. • Lee AC, Maldonado RS, Sarin N, O'Connell RV, Wallace DK, Freedman SF, Cotten M, Toth CA. "National Center for Biotechnology Information." (2011): n. pag. Print.

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