Improving signal levels in intravital multiphoton microscopy using an objective correction collar

Pamela A. Muriello, Kenneth Dunn

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Multiphoton microscopy has enabled biologists to collect high-resolution images hundreds of microns into biological tissues, including tissues of living animals. While the depth of imaging exceeds that possible from any other form of light microscopy, multiphoton microscopy is nonetheless generally limited to depths of less than a millimeter. Many of the advantages of multiphoton microscopy for deep tissue imaging accrue from the unique nature of multiphoton fluorescence excitation. However, the quadratic relationship between illumination level and fluorescence excitation makes multiphoton microscopy especially susceptible to factors that degrade the illumination focus. Here we examine the effect of spherical aberration on multiphoton microscopy in fixed kidney tissues and in the kidneys of living animals. We find that spherical aberration, as evaluated from axial asymmetry in the point-spread function, can be corrected by adjustment of the correction collar of a water immersion objective lens. Introducing a compensatory positive spherical aberration into the imaging system decreases the depth-dependence of signal levels in images collected from living animals, increasing signal by up to 50%.

Original languageEnglish
Pages (from-to)1806-1812
Number of pages7
JournalOptics Communications
Volume281
Issue number7
DOIs
StatePublished - Apr 1 2008

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Microscopic examination
microscopy
Aberrations
Tissue
Animals
animals
aberration
kidneys
Lighting
Fluorescence
Imaging techniques
illumination
water immersion
Optical transfer function
fluorescence
Image resolution
Imaging systems
Optical microscopy
point spread functions
Lenses

Keywords

  • Imaging depth
  • Multiphoton microscopy
  • Objective correction collar
  • Spherical aberration
  • Two-photon microscopy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Improving signal levels in intravital multiphoton microscopy using an objective correction collar. / Muriello, Pamela A.; Dunn, Kenneth.

In: Optics Communications, Vol. 281, No. 7, 01.04.2008, p. 1806-1812.

Research output: Contribution to journalArticle

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