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Journal of Lower Genital Tract Disease: April 2008 - Volume 12 - Issue 2 - p 145
doi: 10.1097/LGT.0b013e31816bcc9a

The editor would like to thank Dr. V. Cecil Wright for pointing out an error in the recent article by L.S. Massad entitled, "Outcomes after diagnosis of vaginal intraepithelial neoplasia." On page 17, second paragraph, the sentence reads "at a power density of 750 to 1,000 W/mm2." This expression of power density is incorrectly expressed. It should read: at an average power density of 750 to 1,000 W/cm2. As Dr. Wright points out, this error could have significant ramifications. It is akin to prescribing the wrong dose of radiation. His references below demonstrate how average power density is calculated and expressed within the effective diameter of a gaussian laser beam.

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1. Fisher JC. The concept, calculation, and surgical importance of power density. In: Wright VC, Fisher JC, eds. Laser Surgery in Gynecology: A Clinical Guide. Philadelphia: WB Saunders; 1993:42-43.
    2. Wright VC, Riopelle MA. Gynecologic CO 2 Laser Surgery. Houston: Biomedical Communications; 1991:11-14.
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      Massad LS. Outcomes after diagnosis of vaginal intraepithelial neoplasia. J Low Gen Tract Dis 2008;12:16-19.
        ©2008The American Society for Colposcopy and Cervical Pathology