PMID- 12570085
OWN - NLM
STAT- MEDLINE
DCOM- 20030305
LR  - 20191210
IS  - 1542-8117 (Print)
IS  - 1542-8117 (Linking)
VI  - 63
IP  - 6
DP  - 2002 Nov-Dec
TI  - Comparison of fiber counting by TV screen and eyepieces of phase contrast 
      microscopy.
PG  - 756-61
AB  - This study designed a modified light path of a phase-contrast microscope to 
      evaluate the feasibility of fiber counting on a television screen (TVS). A 
      comparison also was made of the fiber counts, fiber density, and precision 
      derived from repeatedly counting fibers through eyepieces (EPs) and on a TVS 
      connected to a phase contrast microscope. Thirty asbestos fiber samples were 
      counted 10 times repeatedly. Ten samples were counted by viewing the same field 
      through an EP and on a TVS alternately, whereas the other 20 samples were counted 
      separately by using an EP and a TVS. The A rules of National Institute for 
      Occupational Safety and Health (NIOSH) 7400 method was quoted. No statistically 
      significant difference of fiber density (p = 0.39) or fiber counts (p > 0.05) was 
      observed between the TVS and EP methods, though TVS gave a slightly lower value 
      than EP did. The bias of the two methods was 7.7 +/- 8.0% on an average. The 
      relative standard deviations (RSDs) for both methods were the same, 0.40, which 
      resembled the theoretical RSD, 0.44, of NIOSH 7400. Meanwhile, the theoretical 
      and experimental RSDs were not significantly different for either method (p > 
      0.05). The modified light path of a phase contrast microscope provided a 
      compatible view with less eye strain on a TVS than a conventional EP. Moreover, 
      operator biases and variability might be greatly reduced by training several 
      counters simultaneously on the TVS.
FAU - Mao, I-Fang
AU  - Mao IF
AD  - Institute of Environmental Health Sciences, College of Medicine, National 
      Yang-Ming University, Shi-Pai, Taipei, Taiwan.
FAU - Yeh, Hui-Roung
AU  - Yeh HR
FAU - Chen, Mei-Lien
AU  - Chen ML
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - AIHA J (Fairfax, Va)
JT  - AIHA journal : a journal for the science of occupational and environmental health 
      and safety
JID - 101146781
RN  - 1332-21-4 (Asbestos)
SB  - IM
MH  - Asbestos/*analysis
MH  - Microscopy/instrumentation/*methods
MH  - National Institute for Occupational Safety and Health, U.S.
MH  - *Television
MH  - United States
EDAT- 2003/02/07 04:00
MHDA- 2003/03/06 04:00
CRDT- 2003/02/07 04:00
PHST- 2003/02/07 04:00 [pubmed]
PHST- 2003/03/06 04:00 [medline]
PHST- 2003/02/07 04:00 [entrez]
AID - 10.1080/15428110208984766 [doi]
PST - ppublish
SO  - AIHA J (Fairfax, Va). 2002 Nov-Dec;63(6):756-61. doi: 10.1080/15428110208984766.