Abstract: The present invention provides a method of preparing [123I]Iodooctyl fenbufen amide with a radiochemical yield of 15%, a specific activity of 37 GBq/?mol and radiochemical purity of 95%. The present invention further provides a method of applying [123I]Iodooctyl fenbufen amide as tracer of single photon emission computer tomography (SPECT) to estimate the distribution of cyclooxygenase. By the binding characteristics of the iodine isotope-labeled compounds and the positive correlation of inflammation to tumor lesion, the present invention can estimate the tumor development and metastasis.

Abstract: The present invention provides a method of preparing [123I]Iodooctyl fenbufen amide with a radiochemical yield of 15%, a specific activity of 37 GBq/?mol and radiochemical purity of 95%. The present invention further provides a method of applying [123I]Iodooctyl fenbufen amide as tracer of single photon emission computer tomography (SPECT) to estimate the distribution of cyclooxygenase. By the binding characteristics of the iodine isotope-labeled compounds and the positive correlation of inflammation to tumor lesion, the present invention can estimate the tumor development and metastasis.

Abstract: A multi-factor authentication system and a logon method for a Windows operating system are provided. The system and method thereof are essentially applied to a Windows Vista™ operating system. Without any influence upon the common usage of a user, a multi-factor authentication window is established on a logon screen of the Windows operating system, so as to establish a more secure and convenient logon method. The system includes means for logging on to a Windows OS via a logon program “Winlogon.exe”, means for calling “LogonUI.exe” by the “Winlogon.exe”, means for certifying a user by a credential provider, means for displaying the logon screen having the multi-factor authentication window, means for authenticating via multiple factors, means for identifying a user by comparing the user ID with the user's information in a database, means for refilling the user ID/password, and means for messaging.