Beginning with a moment of silence for slain Officer Brian Moore, the NYPD Thursday commemorated the lives of 18 members of the force who either died in the line of duty last year or who died after working at Ground Zero.

This year's police memorial ceremony led to the unveiling of bronze memorial plaques in the lobby of police headquarters -- the Hall of Heroes. A plaque for Moore, a Massapequa native who was shot dead on a Queens street Saturday and whose funeral is Friday on Long Island, will be dedicated next year.

Fourteen of the names were added to a special Sept. 11 memorial for officers who have died as a result of illnesses believed to stem from their work at Ground Zero after the 2001 terrorist attacks.

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The other four names represent those killed in action last year: Det. Dennis E. Guerra, Officer Michael C. Williams, Det. Wenjian Liu and Det. Rafael L. Ramos. Guerra died from the effects of an arson fire, Williams was killed in a traffic accident, and Ramos and Liu were shot dead in Brooklyn in December.

Officers added to the Sept. 11 memorial are: Capt. Ronald G. Peifer Sr., Sgt. Paul M. Ferrara, Sgt. Donald J. O'Leary Jr., Det. Angel A. Creagh, Det. Michael R. Henry, Det. Steven Hom, Det. John J. Marshall, Det. Robert A. Montanez, Det. Christopher Strucker, Det. William B. Titus Jr., Officer Anthony De Jesus, Officer Nicholas G. Finelli, Officer Allison M. Palmer and Officer Perry T. Villani.

"I would like to believe at some point in time there will not be another name to leave on these walls," NYPD Commissioner William Bratton told the audience at the ceremony, which included Mayor Bill DeBlasio.

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"But we are the police, we are part of the police profession. Unfortunately, that is part of the lives we lead."

Dozens of police fraternal organizations left floral displays in the lobby, the walls of which are covered with memorial spaces. Bratton said there were about 800 names on the memorial wall, the earliest dating to 1849.

"Today is a continuation of the legacy," said Bratton, who later went to the wake for Moore at the Chapey & Sons Funeral Home in Bethpage.

Bratton ended his remarks by quoting lines attributed over the years to Dr. Seuss: "Don't cry for me because it is over, smile because it happened. Remember the good times in life."