Noninvasive monitoring of brain tissue temperature by near-infrared spectroscopy

We propose the use of near-infrared spectroscopy (NIRS) to monitor neonatal brain temperature non-invasively and continuously during hypothermic treatment by measuring changes in the NIR water absorption spectrum. Accurate measurements of the water spectrum in the range 650-1050 nm between 42 and 32 degree(s)C have been made and calibrated using a principal component regression, giving a standard error of calibration of <0.1 degree(s)C for 3 or more principal components. In vivo attenuation spectra measured on the adult forearm as a function of temperature have been employed in a preliminary investigation. In order to predict tissue temperature from changes in the water spectrum, we must first account for the effects of light scattering and haemoglobin absorption. A non-linear difference technique based on diffusion theory has been used to reconstruct the total absorption for each tissue spectrum, with respect to an assumed initial state. Second derivative spectroscopy was used to estimate the initial tissue chromophore concentrations for the reference spectrum. A linear fit to the reconstructed absorption spectra was then performed, using the NIR chromophore spectra and the water loading vectors determined from the PCR calibration. Tissue temperature was predicted with a standard error of approximately 1 degree(s)C.

[1]  R. Doornbos,et al.  The determination of in vivo human tissue optical properties and absolute chromophore concentrations using spatially resolved steady-state diffuse reflectance spectroscopy. , 1999, Physics in medicine and biology.

[2]  D. Delpy,et al.  Use of the water absorption spectrum to quantify tissue chromophore concentration changes in near-infrared spectroscopy. , 1994, Physics in medicine and biology.

[3]  C. Cooper,et al.  Absolute quantification of deoxyhaemoglobin concentration in tissue near infrared spectroscopy. , 1994, Physics in medicine and biology.

[4]  A. Villringer,et al.  Determination of the wavelength dependence of the differential pathlength factor from near-infrared pulse signals , 1998, Physics in medicine and biology.

[5]  Jeffrey J. Kelly,et al.  Tissue temperature by near-infrared spectroscopy , 1995, Photonics West.

[6]  David M. Haaland,et al.  Partial least-squares methods for spectral analyses. 2. Application to simulated and glass spectral data , 1988 .

[7]  S. Arridge,et al.  Estimation of optical pathlength through tissue from direct time of flight measurement , 1988 .

[8]  M D Ginsberg,et al.  Therapeutic modulation of brain temperature: relevance to ischemic brain injury. , 1992, Cerebrovascular and brain metabolism reviews.

[9]  N. Kondo,et al.  Continuous measurement of tympanic temperature with a new infrared method using an optical fiber. , 1998, Journal of applied physiology.

[10]  D. Delpy,et al.  COTSIDE MEASUREMENT OF CEREBRAL BLOOD FLOW IN ILL NEWBORN INFANTS BY NEAR INFRARED SPECTROSCOPY , 1988, The Lancet.

[11]  M Essenpreis,et al.  Effect of temperature on the optical properties of ex vivo human dermis and subdermis. , 1998, Physics in medicine and biology.

[12]  S. Arridge,et al.  Spectral Dependence of Temporal Point Spread Functions in Human Tissues , 2022 .

[13]  P. Cerretelli,et al.  Temperature dependence of human gastrocnemius pH and high‐energy phosphate concentration by noninvasive techniques , 2000, Magnetic resonance in medicine.

[14]  A. Edwards,et al.  Hypothermic neural rescue treatment: from laboratory to cotside? , 1998, Archives of disease in childhood. Fetal and neonatal edition.

[15]  A. Edwards,et al.  Magnetic resonance and near infrared spectroscopy for investigation of perinatal hypoxic-ischaemic brain injury. , 1989, Archives of disease in childhood.

[16]  D T Delpy,et al.  In vivo measurements of the wavelength dependence of tissue-scattering coefficients between 760 and 900 nm measured with time-resolved spectroscopy. , 1997, Applied optics.

[17]  A. Edwards,et al.  Recent advances in developing neuroprotective strategies for perinatal asphyxia. , 1998, Current opinion in pediatrics.

[18]  William H. Press,et al.  Numerical recipes in C , 2002 .

[19]  Roberts Nj,et al.  Recent advances in developing neuroprotective strategies for perinatal asphyxia , 1998 .

[20]  H. Breivik,et al.  Survival After 40 Minutes' Submersion Without Cerebral Sequelae , 1976 .

[21]  D. Delpy,et al.  Prognosis of Newborn Infants with Hypoxic-Ischemic Brain Injury Assessed by Phosphorus Magnetic Resonance Spectroscopy , 1989, Pediatric Research.

[22]  R. Arridget,et al.  The theoretical basis for the determination of optical pathlengths in tissue: temporal and frequency analysis , 1992 .

[23]  M. Thoresen Cooling the asphyxiated brain – ready for clinical trials? , 1999, European Journal of Pediatrics.

[24]  D T Delpy,et al.  The Noninvasive Measurement of Absolute Cerebral Deoxyhemoglobin Concentration and Mean Optical Path Length in the Neonatal Brain by Second Derivative Near Infrared Spectroscopy , 1996, Pediatric Research.

[25]  H. Breivik,et al.  SURVIVAL AFTER 40 MINUTES' SUBMERSION WITHOUT CEREBRAL SEQUELÆ , 1975, The Lancet.

[26]  J G Reves,et al.  The effects of deep hypothermic cardiopulmonary bypass and total circulatory arrest on cerebral blood flow in infants and children. , 1989, The Journal of thoracic and cardiovascular surgery.

[27]  D. Delpy,et al.  A new combined deep-body-temperature/NIRs probe for noninvasive metabolic measurements on human skeletal muscle. , 1999, Advances in experimental medicine and biology.

[28]  M. Ferrari,et al.  Near infrared absorption spectra of human deoxy- and oxyhaemoglobin in the temperature range 20–40°C , 1997 .

[29]  C. Childs,et al.  Tympanic membrane temperature as a measure of core temperature , 1999, Archives of disease in childhood.

[30]  J. Wyatt,et al.  Near-infrared spectroscopy in asphyxial brain injury. , 1993, Clinics in perinatology.

[31]  The effects of deep hypothermic cardiopulmonary bypass and total circulatory arrest on cerebral blood flow in infants and children. , 1989 .

[32]  D. R. White,et al.  The composition of body tissues (II). Fetus to young adult. , 1991, The British journal of radiology.

[33]  J. Toft,et al.  Spectra of water in the near- and mid-infrared region , 1994 .